In this episode of The Mathematicians Podcast, Benjamin Cornish explores the life and works of Nicomachus of Gerasa—a philosopher, mystic, and mathematician whose obsession with numbers shaped centuries of thought. From perfect and amicable numbers to cosmic harmonies and the mystical side of arithmetic, Nicomachus blended maths with philosophy, music, and spirituality in ways that still resonate today. We’ll look at how his Introduction to Arithmetic became the medieval go-to textbook, how his Pythagorean passions fed into Neopythagorean and Neoplatonist traditions, and why he thought numbers weren’t just useful but divine.  Whether you’re into number theory, history of maths, philosophy, or just like your integers with a side of cosmic karaoke, this episode has something for you. Keywords: Nicomachus of Gerasa, history of mathematics, perfect numbers, amicable numbers, Neopythagoreanism, Neoplatonism, Pythagoras, number theory, arithmetic, medieval philosophy, music theory, quadrivium, maths podcast, philosophy of numbers. Hashtags:#MathematiciansPodcast #HistoryOfMaths #Nicomachus #Pythagoras #NumberTheory #PerfectNumbers #AmicableNumbers #PhilosophyOfMaths #Quadrivium #Neopythagorean #Neoplatonism #MathsAndMusic