25651279 has 4 divisors (see below), whose sum is σ = 26766576. Its totient is φ = 24535984.

The previous prime is 25651277. The next prime is 25651319. The reversal of 25651279 is 97215652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25651279 - 2¹ = 25651277 is a prime.

It is a super-2 number, since 2×25651279² = 1315976228671682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25651277) 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 3 ways as a sum of consecutive naturals, for example, 557614 + ... + 557659.

It is an arithmetic number, because the mean of its divisors is an integer number (6691644).

Almost surely, 2^25651279 is an apocalyptic number.

25651279 is a deficient number, since it is larger than the sum of its proper divisors (1115297).

25651279 is a wasteful number, since it uses less digits than its factorization.

25651279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115296.

The product of its digits is 37800, while the sum is 37.

The square root of 25651279 is about 5064.7091723020. The cubic root of 25651279 is about 294.9191734900.

It can be divided in two parts, 2565 and 1279, that added together give a square (3844 = 62²).

The spelling of 25651279 in words is "twenty-five million, six hundred fifty-one thousand, two hundred seventy-nine".