25438671 has 16 divisors (see below), whose sum is σ = 38565120. Its totient is φ = 16563960.

The previous prime is 25438643. The next prime is 25438691. The reversal of 25438671 is 17683452.

It is not a de Polignac number, because 25438671 - 2⁶ = 25438607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25438601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9795 + ... + 12116.

It is an arithmetic number, because the mean of its divisors is an integer number (2410320).

Almost surely, 2^25438671 is an apocalyptic number.

25438671 is a deficient number, since it is larger than the sum of its proper divisors (13126449).

25438671 is a wasteful number, since it uses less digits than its factorization.

25438671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21963 (or 21957 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 25438671 is about 5043.6763377521. The cubic root of 25438671 is about 294.1021094717.

The spelling of 25438671 in words is "twenty-five million, four hundred thirty-eight thousand, six hundred seventy-one".