25502479 has 2 divisors, whose sum is σ = 25502480. Its totient is φ = 25502478.

The previous prime is 25502471. The next prime is 25502507. The reversal of 25502479 is 97420552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25502479 - 2³ = 25502471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25502471) 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 as a sum of consecutive naturals, namely, 12751239 + 12751240.

It is an arithmetic number, because the mean of its divisors is an integer number (12751240).

Almost surely, 2^25502479 is an apocalyptic number.

25502479 is a deficient number, since it is larger than the sum of its proper divisors (1).

25502479 is an equidigital number, since it uses as much as digits as its factorization.

25502479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 25502479 is about 5049.9979207917. The cubic root of 25502479 is about 294.3478036339.

The spelling of 25502479 in words is "twenty-five million, five hundred two thousand, four hundred seventy-nine".