2502639 has 6 divisors (see below), whose sum is σ = 3614936. Its totient is φ = 1668420.

The previous prime is 2502637. The next prime is 2502649. The reversal of 2502639 is 9362052.

2502639 is a `hidden beast` number, since 25 + 0 + 2 + 639 = 666.

It is not a de Polignac number, because 2502639 - 2¹ = 2502637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2502637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139027 + ... + 139044.

2^2502639 is an apocalyptic number.

2502639 is a deficient number, since it is larger than the sum of its proper divisors (1112297).

2502639 is a wasteful number, since it uses less digits than its factorization.

2502639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278077 (or 278074 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 2502639 is about 1581.9731350437. The cubic root of 2502639 is about 135.7686196899.

The spelling of 2502639 in words is "two million, five hundred two thousand, six hundred thirty-nine".