1056502981 has 4 divisors (see below), whose sum is σ = 1073822764. Its totient is φ = 1039183200.

The previous prime is 1056502949. The next prime is 1056503023. The reversal of 1056502981 is 1892056501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 564062500 + 492440481 = 23750^2 + 22191^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056502981 - 2⁵ = 1056502949 is a prime.

It is a super-2 number, since 2×1056502981² = 2232397097723772722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1056502981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056502481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8659800 + ... + 8659921.

It is an arithmetic number, because the mean of its divisors is an integer number (268455691).

Almost surely, 2^1056502981 is an apocalyptic number.

It is an amenable number.

1056502981 is a deficient number, since it is larger than the sum of its proper divisors (17319783).

1056502981 is an equidigital number, since it uses as much as digits as its factorization.

1056502981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17319782.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 1056502981 is about 32503.8917823697. The cubic root of 1056502981 is about 1018.4903275539.

The spelling of 1056502981 in words is "one billion, fifty-six million, five hundred two thousand, nine hundred eighty-one".