25147992 has 16 divisors (see below), whose sum is σ = 62870040. Its totient is φ = 8382656.

The previous prime is 25147949. The next prime is 25148027. The reversal of 25147992 is 29974152.

It is a self number, because there is not a number n which added to its sum of digits gives 25147992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523893 + ... + 523940.

Almost surely, 2^25147992 is an apocalyptic number.

It is an amenable number.

25147992 is an abundant number, since it is smaller than the sum of its proper divisors (37722048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25147992 is a wasteful number, since it uses less digits than its factorization.

25147992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047842 (or 1047838 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 25147992 is about 5014.7773629544. Note that the first 3 decimals coincide. The cubic root of 25147992 is about 292.9776140259.

The spelling of 25147992 in words is "twenty-five million, one hundred forty-seven thousand, nine hundred ninety-two".