25385997 has 48 divisors (see below), whose sum is σ = 43849728. Its totient is φ = 12767040.

The previous prime is 25385977. The next prime is 25385999. The reversal of 25385997 is 79958352.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-25385997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25385999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81472 + ... + 81782.

It is an arithmetic number, because the mean of its divisors is an integer number (913536).

Almost surely, 2^25385997 is an apocalyptic number.

It is an amenable number.

25385997 is a deficient number, since it is larger than the sum of its proper divisors (18463731).

25385997 is a wasteful number, since it uses less digits than its factorization.

25385997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 357 counting only the distinct ones).

The product of its digits is 680400, while the sum is 48.

The square root of 25385997 is about 5038.4518455573. The cubic root of 25385997 is about 293.8989772768.

The spelling of 25385997 in words is "twenty-five million, three hundred eighty-five thousand, nine hundred ninety-seven".