1265504 has 24 divisors (see below), whose sum is σ = 2531088. Its totient is φ = 622720.

The previous prime is 1265503. The next prime is 1265519. The reversal of 1265504 is 4055621.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265503) 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, 1994 + ... + 2550.

It is an arithmetic number, because the mean of its divisors is an integer number (105462).

2^1265504 is an apocalyptic number.

It is an amenable number.

1265504 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1265504 is an equidigital number, since it uses as much as digits as its factorization.

1265504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1265504 is about 1124.9462209368. The cubic root of 1265504 is about 108.1652705087.

The spelling of 1265504 in words is "one million, two hundred sixty-five thousand, five hundred four".