121579880 has 32 divisors (see below), whose sum is σ = 278721000. Its totient is φ = 47713536.

The previous prime is 121579873. The next prime is 121579889. The reversal of 121579880 is 88975121.

It can be written as a sum of positive squares in 4 ways, for example, as 110544196 + 11035684 = 10514^2 + 3322^2 .

It is not an unprimeable number, because it can be changed into a prime (121579889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26555 + ... + 30794.

Almost surely, 2^121579880 is an apocalyptic number.

121579880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121579880 is an abundant number, since it is smaller than the sum of its proper divisors (157141120).

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

121579880 is a wasteful number, since it uses less digits than its factorization.

121579880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57413 (or 57409 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 121579880 is about 11026.3266775477. The cubic root of 121579880 is about 495.3976059216.

The spelling of 121579880 in words is "one hundred twenty-one million, five hundred seventy-nine thousand, eight hundred eighty".