121845920 has 48 divisors (see below), whose sum is σ = 328987008. Its totient is φ = 41775360.

The previous prime is 121845901. The next prime is 121845931. The reversal of 121845920 is 29548121.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53276 + ... + 55515.

It is an arithmetic number, because the mean of its divisors is an integer number (6853896).

Almost surely, 2^121845920 is an apocalyptic number.

121845920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121845920 is an abundant number, since it is smaller than the sum of its proper divisors (207141088).

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

121845920 is a wasteful number, since it uses less digits than its factorization.

121845920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108813 (or 108805 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 121845920 is about 11038.3839396897. The cubic root of 121845920 is about 495.7586842087.

The spelling of 121845920 in words is "one hundred twenty-one million, eight hundred forty-five thousand, nine hundred twenty".