1056431105 has 4 divisors (see below), whose sum is σ = 1267717332. Its totient is φ = 845144880.

The previous prime is 1056431093. The next prime is 1056431137. The reversal of 1056431105 is 5011346501.

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 310922689 + 745508416 = 17633^2 + 27304^2 .

It is not a de Polignac number, because 1056431105 - 2⁶ = 1056431041 is a prime.

It is a super-2 number, since 2×1056431105² = 2232093359223042050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105643106 + ... + 105643115.

It is an arithmetic number, because the mean of its divisors is an integer number (316929333).

Almost surely, 2^1056431105 is an apocalyptic number.

It is an amenable number.

1056431105 is a deficient number, since it is larger than the sum of its proper divisors (211286227).

1056431105 is an equidigital number, since it uses as much as digits as its factorization.

1056431105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211286226.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1056431105 is about 32502.7861113474. The cubic root of 1056431105 is about 1018.4672303890.

Adding to 1056431105 its reverse (5011346501), we get a palindrome (6067777606).

The spelling of 1056431105 in words is "one billion, fifty-six million, four hundred thirty-one thousand, one hundred five".