1256404 has 24 divisors (see below), whose sum is σ = 2314368. Its totient is φ = 596160.

The previous prime is 1256393. The next prime is 1256407. The reversal of 1256404 is 4046521.

It is a super-2 number, since 2×1256404² = 3157102022432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7627 + ... + 7789.

It is an arithmetic number, because the mean of its divisors is an integer number (96432).

2^1256404 is an apocalyptic number.

It is an amenable number.

1256404 is a deficient number, since it is larger than the sum of its proper divisors (1057964).

1256404 is a wasteful number, since it uses less digits than its factorization.

1256404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1256404 is about 1120.8942858272. The cubic root of 1256404 is about 107.9053812348.

The spelling of 1256404 in words is "one million, two hundred fifty-six thousand, four hundred four".