2656239 has 16 divisors (see below), whose sum is σ = 3696000. Its totient is φ = 1695456.

The previous prime is 2656229. The next prime is 2656243. The reversal of 2656239 is 9326562.

It is not a de Polignac number, because 2656239 - 2⁵ = 2656207 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7437 + ... + 7785.

It is an arithmetic number, because the mean of its divisors is an integer number (231000).

2^2656239 is an apocalyptic number.

2656239 is a deficient number, since it is larger than the sum of its proper divisors (1039761).

2656239 is a wasteful number, since it uses less digits than its factorization.

2656239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454.

The product of its digits is 19440, while the sum is 33.

The square root of 2656239 is about 1629.7972266512. The cubic root of 2656239 is about 138.4912652461.

It can be divided in two parts, 26 and 56239, that added together give a palindrome (56265).

The spelling of 2656239 in words is "two million, six hundred fifty-six thousand, two hundred thirty-nine".