1157120656 has 20 divisors (see below), whose sum is σ = 2242978092. Its totient is φ = 578287616.

The previous prime is 1157120617. The next prime is 1157120693. The reversal of 1157120656 is 6560217511.

It can be written as a sum of positive squares in 2 ways, for example, as 1034265600 + 122855056 = 32160^2 + 11084^2 .

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 3 ways as a sum of consecutive naturals, for example, 20460 + ... + 52276.

Almost surely, 2^1157120656 is an apocalyptic number.

1157120656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1157120656 is a deficient number, since it is larger than the sum of its proper divisors (1085857436).

1157120656 is a wasteful number, since it uses less digits than its factorization.

1157120656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34098 (or 34092 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1157120656 is about 34016.4762431384. The cubic root of 1157120656 is about 1049.8474928918.

It can be divided in two parts, 1157120 and 656, that added together give a square (1157776 = 1076²).

The spelling of 1157120656 in words is "one billion, one hundred fifty-seven million, one hundred twenty thousand, six hundred fifty-six".