1155121924 has 48 divisors (see below), whose sum is σ = 2257004736. Its totient is φ = 512870400.

The previous prime is 1155121921. The next prime is 1155121993. The reversal of 1155121924 is 4291215511.

It is not an unprimeable number, because it can be changed into a prime (1155121921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342004 + ... + 345364.

It is an arithmetic number, because the mean of its divisors is an integer number (47020932).

Almost surely, 2^1155121924 is an apocalyptic number.

It is an amenable number.

1155121924 is a deficient number, since it is larger than the sum of its proper divisors (1101882812).

1155121924 is a wasteful number, since it uses less digits than its factorization.

1155121924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556 (or 3554 counting only the distinct ones).

The product of its digits is 3600, while the sum is 31.

The square root of 1155121924 is about 33987.0846646193. The cubic root of 1155121924 is about 1049.2426659824.

The spelling of 1155121924 in words is "one billion, one hundred fifty-five million, one hundred twenty-one thousand, nine hundred twenty-four".