1265465264 has 20 divisors (see below), whose sum is σ = 2802101904. Its totient is φ = 542342208.

The previous prime is 1265465263. The next prime is 1265465273. The reversal of 1265465264 is 4625645621.

It is not an unprimeable number, because it can be changed into a prime (1265465263) 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, 5649287 + ... + 5649510.

Almost surely, 2^1265465264 is an apocalyptic number.

1265465264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1265465264 is an abundant number, since it is smaller than the sum of its proper divisors (1536636640).

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

1265465264 is a wasteful number, since it uses less digits than its factorization.

1265465264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11298812 (or 11298806 counting only the distinct ones).

The product of its digits is 345600, while the sum is 41.

The square root of 1265465264 is about 35573.3785856784. The cubic root of 1265465264 is about 1081.6416688179.

The spelling of 1265465264 in words is "one billion, two hundred sixty-five million, four hundred sixty-five thousand, two hundred sixty-four".