2492639 has 4 divisors (see below), whose sum is σ = 2495856. Its totient is φ = 2489424.

The previous prime is 2492603. The next prime is 2492657. The reversal of 2492639 is 9362942.

2492639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9362942 = 2 ⋅4681471.

It is a cyclic number.

It is not a de Polignac number, because 2492639 - 2⁸ = 2492383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2492599 and 2492608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2492239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (623964).

2^2492639 is an apocalyptic number.

2492639 is a deficient number, since it is larger than the sum of its proper divisors (3217).

2492639 is a wasteful number, since it uses less digits than its factorization.

2492639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216.

The product of its digits is 23328, while the sum is 35.

The square root of 2492639 is about 1578.8093615127. The cubic root of 2492639 is about 135.5875443582.

The spelling of 2492639 in words is "two million, four hundred ninety-two thousand, six hundred thirty-nine".