1264531 has 4 divisors (see below), whose sum is σ = 1276912. Its totient is φ = 1252152.

The previous prime is 1264499. The next prime is 1264537. The reversal of 1264531 is 1354621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1354621 = 151 ⋅8971.

It is a cyclic number.

It is not a de Polignac number, because 1264531 - 2⁵ = 1264499 is a prime.

It is a super-2 number, since 2×1264531² = 3198077299922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6036 + ... + 6241.

It is an arithmetic number, because the mean of its divisors is an integer number (319228).

2^1264531 is an apocalyptic number.

1264531 is a deficient number, since it is larger than the sum of its proper divisors (12381).

1264531 is a wasteful number, since it uses less digits than its factorization.

1264531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12380.

The product of its digits is 720, while the sum is 22.

The square root of 1264531 is about 1124.5136726603. The cubic root of 1264531 is about 108.1375419534.

The spelling of 1264531 in words is "one million, two hundred sixty-four thousand, five hundred thirty-one".