2556530 has 8 divisors (see below), whose sum is σ = 4601772. Its totient is φ = 1022608.

The previous prime is 2556523. The next prime is 2556559. The reversal of 2556530 is 356552.

It can be written as a sum of positive squares in 2 ways, for example, as 2070721 + 485809 = 1439^2 + 697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2556530.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127817 + ... + 127836.

2^2556530 is an apocalyptic number.

2556530 is a deficient number, since it is larger than the sum of its proper divisors (2045242).

2556530 is a wasteful number, since it uses less digits than its factorization.

2556530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255660.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 2556530 is about 1598.9152572916. The cubic root of 2556530 is about 136.7362392810.

The spelling of 2556530 in words is "two million, five hundred fifty-six thousand, five hundred thirty".