25422499 has 2 divisors, whose sum is σ = 25422500. Its totient is φ = 25422498.

The previous prime is 25422487. The next prime is 25422533. The reversal of 25422499 is 99422452.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25422499 is a prime.

It is not a weakly prime, because it can be changed into another prime (25429499) 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 as a sum of consecutive naturals, namely, 12711249 + 12711250.

It is an arithmetic number, because the mean of its divisors is an integer number (12711250).

Almost surely, 2^25422499 is an apocalyptic number.

25422499 is a deficient number, since it is larger than the sum of its proper divisors (1).

25422499 is an equidigital number, since it uses as much as digits as its factorization.

25422499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 25422499 is about 5042.0728872161. The cubic root of 25422499 is about 294.0397735691.

It can be divided in two parts, 25422 and 499, that added together give a square (25921 = 161²).

The spelling of 25422499 in words is "twenty-five million, four hundred twenty-two thousand, four hundred ninety-nine".