1155140520 has 32 divisors (see below), whose sum is σ = 3465421920. Its totient is φ = 308037440.

The previous prime is 1155140509. The next prime is 1155140537. The reversal of 1155140520 is 250415511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4812966 + ... + 4813205.

It is an arithmetic number, because the mean of its divisors is an integer number (108294435).

Almost surely, 2^1155140520 is an apocalyptic number.

1155140520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155140520 is an abundant number, since it is smaller than the sum of its proper divisors (2310281400).

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

1155140520 is a wasteful number, since it uses less digits than its factorization.

1155140520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9626185 (or 9626181 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 1155140520 is about 33987.3582380273. The cubic root of 1155140520 is about 1049.2482964448.

The spelling of 1155140520 in words is "one billion, one hundred fifty-five million, one hundred forty thousand, five hundred twenty".