25139757 has 8 divisors (see below), whose sum is σ = 33833376. Its totient is φ = 16602992.

The previous prime is 25139731. The next prime is 25139767. The reversal of 25139757 is 75793152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25139757 - 2⁷ = 25139629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25139767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38838 + ... + 39479.

It is an arithmetic number, because the mean of its divisors is an integer number (4229172).

Almost surely, 2^25139757 is an apocalyptic number.

It is an amenable number.

25139757 is a deficient number, since it is larger than the sum of its proper divisors (8693619).

25139757 is a wasteful number, since it uses less digits than its factorization.

25139757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78427.

The product of its digits is 66150, while the sum is 39.

The square root of 25139757 is about 5013.9562223857. The cubic root of 25139757 is about 292.9456309017.

The spelling of 25139757 in words is "twenty-five million, one hundred thirty-nine thousand, seven hundred fifty-seven".