2656634 has 4 divisors (see below), whose sum is σ = 3984954. Its totient is φ = 1328316.

The previous prime is 2656627. The next prime is 2656639. The reversal of 2656634 is 4366562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4366562 = 2 ⋅2183281.

It can be written as a sum of positive squares in only one way, i.e., 2569609 + 87025 = 1603^2 + 295^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2656634.

It is not an unprimeable number, because it can be changed into a prime (2656639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664157 + ... + 664160.

2^2656634 is an apocalyptic number.

2656634 is a deficient number, since it is larger than the sum of its proper divisors (1328320).

2656634 is a wasteful number, since it uses less digits than its factorization.

2656634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328319.

The product of its digits is 25920, while the sum is 32.

The square root of 2656634 is about 1629.9184028656. The cubic root of 2656634 is about 138.4981297562.

The spelling of 2656634 in words is "two million, six hundred fifty-six thousand, six hundred thirty-four".