1265904 has 60 divisors (see below), whose sum is σ = 3627000. Its totient is φ = 412032.

The previous prime is 1265903. The next prime is 1265909. The reversal of 1265904 is 4095621.

1265904 is a `hidden beast` number, since 1 + 2 + 659 + 0 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8422 + ... + 8570.

It is an arithmetic number, because the mean of its divisors is an integer number (60450).

2^1265904 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 1265904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813500).

1265904 is an abundant number, since it is smaller than the sum of its proper divisors (2361096).

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

1265904 is a wasteful number, since it uses less digits than its factorization.

1265904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1265904 is about 1125.1239931670. The cubic root of 1265904 is about 108.1766655867.

The spelling of 1265904 in words is "one million, two hundred sixty-five thousand, nine hundred four".