1256904 has 96 divisors (see below), whose sum is σ = 3981600. Its totient is φ = 364320.

The previous prime is 1256903. The next prime is 1256911. The reversal of 1256904 is 4096521.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1256903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54637 + ... + 54659.

It is an arithmetic number, because the mean of its divisors is an integer number (41475).

2^1256904 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 1256904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1990800).

1256904 is an abundant number, since it is smaller than the sum of its proper divisors (2724696).

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

1256904 is a wasteful number, since it uses less digits than its factorization.

1256904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 39 counting only the distinct ones).

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

The square root of 1256904 is about 1121.1172998398. The cubic root of 1256904 is about 107.9196933868.

The spelling of 1256904 in words is "one million, two hundred fifty-six thousand, nine hundred four".