2561902 has 16 divisors (see below), whose sum is σ = 4534272. Its totient is φ = 1062360.

The previous prime is 2561899. The next prime is 2561921. The reversal of 2561902 is 2091652.

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 in 7 ways as a sum of consecutive naturals, for example, 2518 + ... + 3385.

It is an arithmetic number, because the mean of its divisors is an integer number (283392).

2^2561902 is an apocalyptic number.

2561902 is a deficient number, since it is larger than the sum of its proper divisors (1972370).

2561902 is a wasteful number, since it uses less digits than its factorization.

2561902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5943.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2561902 is about 1600.5942646405. The cubic root of 2561902 is about 136.8319462457.

The spelling of 2561902 in words is "two million, five hundred sixty-one thousand, nine hundred two".