1156065920 has 32 divisors (see below), whose sum is σ = 2763721620. Its totient is φ = 462426112.

The previous prime is 1156065917. The next prime is 1156065959. The reversal of 1156065920 is 295606511.

It can be written as a sum of positive squares in 2 ways, for example, as 1065891904 + 90174016 = 32648^2 + 9496^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1156065920² = 2672976822770892800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902537 + ... + 903816.

Almost surely, 2^1156065920 is an apocalyptic number.

1156065920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156065920 is an abundant number, since it is smaller than the sum of its proper divisors (1607655700).

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

1156065920 is an equidigital number, since it uses as much as digits as its factorization.

1156065920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806372 (or 1806360 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 1156065920 is about 34000.9693979451. The cubic root of 1156065920 is about 1049.5284110528.

The spelling of 1156065920 in words is "one billion, one hundred fifty-six million, sixty-five thousand, nine hundred twenty".