1056359781 has 12 divisors (see below), whose sum is σ = 1526943808. Its totient is φ = 703736424.

The previous prime is 1056359749. The next prime is 1056359803. The reversal of 1056359781 is 1879536501.

It is a happy number.

1056359781 is a `hidden beast` number, since 1 + 0 + 5 + 635 + 9 + 7 + 8 + 1 = 666.

It is not a de Polignac number, because 1056359781 - 2⁵ = 1056359749 is a prime.

It is a super-2 number, since 2×1056359781² = 2231791973828735922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056359741) 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 11 ways as a sum of consecutive naturals, for example, 28435 + ... + 54048.

Almost surely, 2^1056359781 is an apocalyptic number.

It is an amenable number.

1056359781 is a deficient number, since it is larger than the sum of its proper divisors (470584027).

1056359781 is a wasteful number, since it uses less digits than its factorization.

1056359781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83912 (or 83909 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 1056359781 is about 32501.6888945790. The cubic root of 1056359781 is about 1018.4443095721. Note that the first 3 decimals are identical.

The spelling of 1056359781 in words is "one billion, fifty-six million, three hundred fifty-nine thousand, seven hundred eighty-one".