1156560520 has 32 divisors (see below), whose sum is σ = 2715405120. Its totient is φ = 442509760.

The previous prime is 1156560437. The next prime is 1156560527. The reversal of 1156560520 is 250656511.

It is not an unprimeable number, because it can be changed into a prime (1156560527) 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, 627646 + ... + 629485.

It is an arithmetic number, because the mean of its divisors is an integer number (84856410).

Almost surely, 2^1156560520 is an apocalyptic number.

1156560520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156560520 is an abundant number, since it is smaller than the sum of its proper divisors (1558844600).

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

1156560520 is a wasteful number, since it uses less digits than its factorization.

1156560520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257165 (or 1257161 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1156560520 is about 34008.2419422116. The cubic root of 1156560520 is about 1049.6780630557.

The spelling of 1156560520 in words is "one billion, one hundred fifty-six million, five hundred sixty thousand, five hundred twenty".