1056431451 has 4 divisors (see below), whose sum is σ = 1408575272. Its totient is φ = 704287632.

The previous prime is 1056431449. The next prime is 1056431471. The reversal of 1056431451 is 1541346501.

It is a happy number.

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

It is not a de Polignac number, because 1056431451 - 2¹ = 1056431449 is a prime.

It is a super-2 number, since 2×1056431451² = 2232094821323930802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056431471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176071906 + ... + 176071911.

It is an arithmetic number, because the mean of its divisors is an integer number (352143818).

Almost surely, 2^1056431451 is an apocalyptic number.

1056431451 is a deficient number, since it is larger than the sum of its proper divisors (352143821).

1056431451 is an equidigital number, since it uses as much as digits as its factorization.

1056431451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352143820.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1056431451 is about 32502.7914339676. The cubic root of 1056431451 is about 1018.4673415777.

Adding to 1056431451 its reverse (1541346501), we get a palindrome (2597777952).

The spelling of 1056431451 in words is "one billion, fifty-six million, four hundred thirty-one thousand, four hundred fifty-one".