25226979 has 4 divisors (see below), whose sum is σ = 33635976. Its totient is φ = 16817984.

The previous prime is 25226953. The next prime is 25226983. The reversal of 25226979 is 97962252.

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 25226979 - 2⁵ = 25226947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25226979.

It is not an unprimeable number, because it can be changed into a prime (25226989) 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, 4204494 + ... + 4204499.

It is an arithmetic number, because the mean of its divisors is an integer number (8408994).

Almost surely, 2^25226979 is an apocalyptic number.

25226979 is a deficient number, since it is larger than the sum of its proper divisors (8408997).

25226979 is an equidigital number, since it uses as much as digits as its factorization.

25226979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408996.

The product of its digits is 136080, while the sum is 42.

The square root of 25226979 is about 5022.6466130915. The cubic root of 25226979 is about 293.2840299654.

The spelling of 25226979 in words is "twenty-five million, two hundred twenty-six thousand, nine hundred seventy-nine".