1265015264 has 48 divisors (see below), whose sum is σ = 2659547520. Its totient is φ = 590983680.

The previous prime is 1265015261. The next prime is 1265015281. The reversal of 1265015264 is 4625105621.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1265015264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265015261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6782 + ... + 50754.

It is an arithmetic number, because the mean of its divisors is an integer number (55407240).

Almost surely, 2^1265015264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265015264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1329773760).

1265015264 is an abundant number, since it is smaller than the sum of its proper divisors (1394532256).

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

1265015264 is a wasteful number, since it uses less digits than its factorization.

1265015264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44043 (or 44035 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1265015264 is about 35567.0530688164. The cubic root of 1265015264 is about 1081.5134428679.

The spelling of 1265015264 in words is "one billion, two hundred sixty-five million, fifteen thousand, two hundred sixty-four".