121562880 has 72 divisors (see below), whose sum is σ = 388253712. Its totient is φ = 32415744.

The previous prime is 121562851. The next prime is 121562899. The reversal of 121562880 is 88265121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11989 + ... + 19668.

Almost surely, 2^121562880 is an apocalyptic number.

121562880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121562880 is an abundant number, since it is smaller than the sum of its proper divisors (266690832).

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

121562880 is an equidigital number, since it uses as much as digits as its factorization.

121562880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31681 (or 31667 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 121562880 is about 11025.5557683048. Note that the first 3 decimals coincide. The cubic root of 121562880 is about 495.3745150619.

The spelling of 121562880 in words is "one hundred twenty-one million, five hundred sixty-two thousand, eight hundred eighty".