25425839 has 2 divisors, whose sum is σ = 25425840. Its totient is φ = 25425838.

The previous prime is 25425823. The next prime is 25425847. The reversal of 25425839 is 93852452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25425839 - 2⁴ = 25425823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25425889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12712919 + 12712920.

It is an arithmetic number, because the mean of its divisors is an integer number (12712920).

Almost surely, 2^25425839 is an apocalyptic number.

25425839 is a deficient number, since it is larger than the sum of its proper divisors (1).

25425839 is an equidigital number, since it uses as much as digits as its factorization.

25425839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 25425839 is about 5042.4040893209. The cubic root of 25425839 is about 294.0526499566.

The spelling of 25425839 in words is "twenty-five million, four hundred twenty-five thousand, eight hundred thirty-nine".