2520656 has 20 divisors (see below), whose sum is σ = 4910772. Its totient is φ = 1253376.

The previous prime is 2520649. The next prime is 2520659. The reversal of 2520656 is 6560252.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 1345600 = 1084^2 + 1160^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3806 + ... + 4418.

2^2520656 is an apocalyptic number.

It is an amenable number.

2520656 is a deficient number, since it is larger than the sum of its proper divisors (2390116).

2520656 is a wasteful number, since it uses less digits than its factorization.

2520656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 2520656 is about 1587.6573937723. The cubic root of 2520656 is about 136.0936494545.

The spelling of 2520656 in words is "two million, five hundred twenty thousand, six hundred fifty-six".