1265304664 has 32 divisors (see below), whose sum is σ = 2557714320. Its totient is φ = 583353216.

The previous prime is 1265304661. The next prime is 1265304673. The reversal of 1265304664 is 4664035621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265304661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97587 + ... + 109789.

Almost surely, 2^1265304664 is an apocalyptic number.

It is an amenable number.

1265304664 is an abundant number, since it is smaller than the sum of its proper divisors (1292409656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265304664 is a wasteful number, since it uses less digits than its factorization.

1265304664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13219 (or 13215 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 1265304664 is about 35571.1212080811. The cubic root of 1265304664 is about 1081.5959098901.

The spelling of 1265304664 in words is "one billion, two hundred sixty-five million, three hundred four thousand, six hundred sixty-four".