25600139 has 4 divisors (see below), whose sum is σ = 25712160. Its totient is φ = 25488120.

The previous prime is 25600123. The next prime is 25600153. The reversal of 25600139 is 93100652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25600139 - 2⁴ = 25600123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25600199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55667 + ... + 56124.

It is an arithmetic number, because the mean of its divisors is an integer number (6428040).

Almost surely, 2^25600139 is an apocalyptic number.

25600139 is a deficient number, since it is larger than the sum of its proper divisors (112021).

25600139 is a wasteful number, since it uses less digits than its factorization.

25600139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112020.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 25600139 is about 5059.6579923943. The cubic root of 25600139 is about 294.7230533073.

The spelling of 25600139 in words is "twenty-five million, six hundred thousand, one hundred thirty-nine".