1372865531 has 2 divisors, whose sum is σ = 1372865532. Its totient is φ = 1372865530.

The previous prime is 1372865503. The next prime is 1372865537. The reversal of 1372865531 is 1355682731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1372865531 is a prime.

It is a super-2 number, since 2×1372865531² = 3769519532415823922, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1372865537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686432765 + 686432766.

It is an arithmetic number, because the mean of its divisors is an integer number (686432766).

Almost surely, 2^1372865531 is an apocalyptic number.

1372865531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372865531 is an equidigital number, since it uses as much as digits as its factorization.

1372865531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 1372865531 is about 37052.2000831260. The cubic root of 1372865531 is about 1111.4143513440.

The spelling of 1372865531 in words is "one billion, three hundred seventy-two million, eight hundred sixty-five thousand, five hundred thirty-one".