25425999 has 12 divisors (see below), whose sum is σ = 38887056. Its totient is φ = 15953472.

The previous prime is 25425989. The next prime is 25426001. The reversal of 25425999 is 99952452.

25425999 is a `hidden beast` number, since 2 + 54 + 2 + 599 + 9 = 666.

It is not a de Polignac number, because 25425999 - 2⁷ = 25425871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25425949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82939 + ... + 83244.

It is an arithmetic number, because the mean of its divisors is an integer number (3240588).

Almost surely, 2^25425999 is an apocalyptic number.

25425999 is a deficient number, since it is larger than the sum of its proper divisors (13461057).

25425999 is a wasteful number, since it uses less digits than its factorization.

25425999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166206 (or 166203 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 25425999 is about 5042.4199547440. The cubic root of 25425999 is about 294.0532667612.

The spelling of 25425999 in words is "twenty-five million, four hundred twenty-five thousand, nine hundred ninety-nine".