1121579656 has 16 divisors (see below), whose sum is σ = 2106745740. Its totient is φ = 559780800.

The previous prime is 1121579653. The next prime is 1121579677. The reversal of 1121579656 is 6569751211.

It can be written as a sum of positive squares in 2 ways, for example, as 946546756 + 175032900 = 30766^2 + 13230^2 .

It is not an unprimeable number, because it can be changed into a prime (1121579651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121395 + ... + 130306.

Almost surely, 2^1121579656 is an apocalyptic number.

It is an amenable number.

1121579656 is a deficient number, since it is larger than the sum of its proper divisors (985166084).

1121579656 is a wasteful number, since it uses less digits than its factorization.

1121579656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252264 (or 252260 counting only the distinct ones).

The product of its digits is 113400, while the sum is 43.

The square root of 1121579656 is about 33489.9933711549. The cubic root of 1121579656 is about 1038.9868263977.

The spelling of 1121579656 in words is "one billion, one hundred twenty-one million, five hundred seventy-nine thousand, six hundred fifty-six".