25139216 has 10 divisors (see below), whose sum is σ = 48707262. Its totient is φ = 12569600.

The previous prime is 25139159. The next prime is 25139227. The reversal of 25139216 is 61293152.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 5779216 = 4400^2 + 2404^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 785585 + ... + 785616.

Almost surely, 2^25139216 is an apocalyptic number.

It is an amenable number.

25139216 is a deficient number, since it is larger than the sum of its proper divisors (23568046).

25139216 is a wasteful number, since it uses less digits than its factorization.

25139216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571209 (or 1571203 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 25139216 is about 5013.9022726814. The cubic root of 25139216 is about 292.9435295194.

The spelling of 25139216 in words is "twenty-five million, one hundred thirty-nine thousand, two hundred sixteen".