25393871 has 4 divisors (see below), whose sum is σ = 25772952. Its totient is φ = 25014792.

The previous prime is 25393859. The next prime is 25393889. The reversal of 25393871 is 17839352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25393871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25393271) 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, 189440 + ... + 189573.

It is an arithmetic number, because the mean of its divisors is an integer number (6443238).

Almost surely, 2^25393871 is an apocalyptic number.

25393871 is a deficient number, since it is larger than the sum of its proper divisors (379081).

25393871 is an equidigital number, since it uses as much as digits as its factorization.

25393871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379080.

The product of its digits is 45360, while the sum is 38.

The square root of 25393871 is about 5039.2331757917. The cubic root of 25393871 is about 293.9293604487.

The spelling of 25393871 in words is "twenty-five million, three hundred ninety-three thousand, eight hundred seventy-one".