121951560 has 32 divisors (see below), whose sum is σ = 365855040. Its totient is φ = 32520384.

The previous prime is 121951559. The next prime is 121951567. The reversal of 121951560 is 65159121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (121951567) 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, 508012 + ... + 508251.

It is an arithmetic number, because the mean of its divisors is an integer number (11432970).

Almost surely, 2^121951560 is an apocalyptic number.

121951560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121951560 is an abundant number, since it is smaller than the sum of its proper divisors (243903480).

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

121951560 is a wasteful number, since it uses less digits than its factorization.

121951560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016277 (or 1016273 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 121951560 is about 11043.1680237149. The cubic root of 121951560 is about 495.9019165228.

The spelling of 121951560 in words is "one hundred twenty-one million, nine hundred fifty-one thousand, five hundred sixty".