1264717531 has 16 divisors (see below), whose sum is σ = 1589833728. Its totient is φ = 985486920.

The previous prime is 1264717523. The next prime is 1264717541. The reversal of 1264717531 is 1357174621.

It is not a de Polignac number, because 1264717531 - 2³ = 1264717523 is a prime.

It is a super-2 number, since 2×1264717531² = 3199020866437471922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1264717541) 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, 58555 + ... + 77188.

It is an arithmetic number, because the mean of its divisors is an integer number (99364608).

Almost surely, 2^1264717531 is an apocalyptic number.

1264717531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1264717531 is a deficient number, since it is larger than the sum of its proper divisors (325116197).

1264717531 is an equidigital number, since it uses as much as digits as its factorization.

1264717531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135783 (or 135761 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 1264717531 is about 35562.8673056603. The cubic root of 1264717531 is about 1081.4285881586.

The spelling of 1264717531 in words is "one billion, two hundred sixty-four million, seven hundred seventeen thousand, five hundred thirty-one".