1252631431 has 2 divisors, whose sum is σ = 1252631432. Its totient is φ = 1252631430.

The previous prime is 1252631407. The next prime is 1252631437. The reversal of 1252631431 is 1341362521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1252631431 - 2⁵ = 1252631399 is a prime.

It is a super-2 number, since 2×1252631431² = 3138171003858215522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1252631431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252631437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626315715 + 626315716.

It is an arithmetic number, because the mean of its divisors is an integer number (626315716).

Almost surely, 2^1252631431 is an apocalyptic number.

1252631431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252631431 is an equidigital number, since it uses as much as digits as its factorization.

1252631431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 1252631431 is about 35392.5335487586. The cubic root of 1252631431 is about 1077.9727147069.

Adding to 1252631431 its reverse (1341362521), we get a palindrome (2593993952).

The spelling of 1252631431 in words is "one billion, two hundred fifty-two million, six hundred thirty-one thousand, four hundred thirty-one".