2551256 has 8 divisors (see below), whose sum is σ = 4783620. Its totient is φ = 1275624.

The previous prime is 2551249. The next prime is 2551273. The reversal of 2551256 is 6521552.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159446 + ... + 159461.

2^2551256 is an apocalyptic number.

It is an amenable number.

2551256 is a deficient number, since it is larger than the sum of its proper divisors (2232364).

2551256 is a wasteful number, since it uses less digits than its factorization.

2551256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318913 (or 318909 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 2551256 is about 1597.2651627078. The cubic root of 2551256 is about 136.6421477595.

The spelling of 2551256 in words is "two million, five hundred fifty-one thousand, two hundred fifty-six".