121579172 has 48 divisors (see below), whose sum is σ = 264684672. Its totient is φ = 48007680.

The previous prime is 121579169. The next prime is 121579181. The reversal of 121579172 is 271975121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3473 + ... + 15975.

It is an arithmetic number, because the mean of its divisors is an integer number (5514264).

Almost surely, 2^121579172 is an apocalyptic number.

It is an amenable number.

121579172 is an abundant number, since it is smaller than the sum of its proper divisors (143105500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121579172 is a wasteful number, since it uses less digits than its factorization.

121579172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12548 (or 12546 counting only the distinct ones).

The product of its digits is 8820, while the sum is 35.

The square root of 121579172 is about 11026.2945725207. The cubic root of 121579172 is about 495.3966442981.

The spelling of 121579172 in words is "one hundred twenty-one million, five hundred seventy-nine thousand, one hundred seventy-two".