1252971531 has 16 divisors (see below), whose sum is σ = 2121433600. Its totient is φ = 715983624.

The previous prime is 1252971527. The next prime is 1252971541. The reversal of 1252971531 is 1351792521.

1252971531 is a `hidden beast` number, since 1 + 2 + 52 + 9 + 71 + 531 = 666.

It is not a de Polignac number, because 1252971531 - 2² = 1252971527 is a prime.

It is a super-2 number, since 2×1252971531² = 3139875314992967922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252971541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3314551 + ... + 3314928.

It is an arithmetic number, because the mean of its divisors is an integer number (132589600).

Almost surely, 2^1252971531 is an apocalyptic number.

1252971531 is a deficient number, since it is larger than the sum of its proper divisors (868462069).

1252971531 is an equidigital number, since it uses as much as digits as its factorization.

1252971531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6629495 (or 6629489 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 1252971531 is about 35397.3379083795. The cubic root of 1252971531 is about 1078.0702654405.

The spelling of 1252971531 in words is "one billion, two hundred fifty-two million, nine hundred seventy-one thousand, five hundred thirty-one".