25421166 has 12 divisors (see below), whose sum is σ = 55079232. Its totient is φ = 8473716.

The previous prime is 25421161. The next prime is 25421237. The reversal of 25421166 is 66112452.

25421166 is a `hidden beast` number, since 2 + 542 + 116 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25421161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 706126 + ... + 706161.

It is an arithmetic number, because the mean of its divisors is an integer number (4589936).

Almost surely, 2^25421166 is an apocalyptic number.

25421166 is an abundant number, since it is smaller than the sum of its proper divisors (29658066).

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

25421166 is a wasteful number, since it uses less digits than its factorization.

25421166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412295 (or 1412292 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 25421166 is about 5041.9406977869. The cubic root of 25421166 is about 294.0346342649.

The spelling of 25421166 in words is "twenty-five million, four hundred twenty-one thousand, one hundred sixty-six".