2501656 has 32 divisors (see below), whose sum is σ = 4989600. Its totient is φ = 1173760.

The previous prime is 2501651. The next prime is 2501657. The reversal of 2501656 is 6561052.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2501656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2501651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9381 + ... + 9643.

It is an arithmetic number, because the mean of its divisors is an integer number (155925).

2^2501656 is an apocalyptic number.

It is an amenable number.

2501656 is a deficient number, since it is larger than the sum of its proper divisors (2487944).

2501656 is a wasteful number, since it uses less digits than its factorization.

2501656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2501656 is about 1581.6624165731. The cubic root of 2501656 is about 135.7508413859.

The spelling of 2501656 in words is "two million, five hundred one thousand, six hundred fifty-six".