1056111857 has 2 divisors, whose sum is σ = 1056111858. Its totient is φ = 1056111856.

The previous prime is 1056111829. The next prime is 1056111869. The reversal of 1056111857 is 7581116501.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1041740176 + 14371681 = 32276^2 + 3791^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056111857 - 2²⁰ = 1055063281 is a prime.

It is a super-2 number, since 2×1056111857² = 2230744508991976898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056111817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528055928 + 528055929.

It is an arithmetic number, because the mean of its divisors is an integer number (528055929).

Almost surely, 2^1056111857 is an apocalyptic number.

It is an amenable number.

1056111857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056111857 is an equidigital number, since it uses as much as digits as its factorization.

1056111857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 35.

The square root of 1056111857 is about 32497.8746535831. The cubic root of 1056111857 is about 1018.3646282150.

The spelling of 1056111857 in words is "one billion, fifty-six million, one hundred eleven thousand, eight hundred fifty-seven".