1264490531 has 4 divisors (see below), whose sum is σ = 1283363592. Its totient is φ = 1245617472.

The previous prime is 1264490519. The next prime is 1264490569. The reversal of 1264490531 is 1350944621.

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

It is a cyclic number.

It is not a de Polignac number, because 1264490531 - 2¹⁴ = 1264474147 is a prime.

It is a super-2 number, since 2×1264490531² = 3197872605977323922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1264490491 and 1264490500.

It is not an unprimeable number, because it can be changed into a prime (1264490581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9436430 + ... + 9436563.

It is an arithmetic number, because the mean of its divisors is an integer number (320840898).

Almost surely, 2^1264490531 is an apocalyptic number.

1264490531 is a deficient number, since it is larger than the sum of its proper divisors (18873061).

1264490531 is an equidigital number, since it uses as much as digits as its factorization.

1264490531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18873060.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1264490531 is about 35559.6756312540. The cubic root of 1264490531 is about 1081.3638835976.

The spelling of 1264490531 in words is "one billion, two hundred sixty-four million, four hundred ninety thousand, five hundred thirty-one".