25871239 has 2 divisors, whose sum is σ = 25871240. Its totient is φ = 25871238.

The previous prime is 25871213. The next prime is 25871243. The reversal of 25871239 is 93217852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25871239 - 2¹⁷ = 25740167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25871198 and 25871207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25871039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12935619 + 12935620.

It is an arithmetic number, because the mean of its divisors is an integer number (12935620).

Almost surely, 2^25871239 is an apocalyptic number.

25871239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25871239 is an equidigital number, since it uses as much as digits as its factorization.

25871239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 25871239 is about 5086.3777877779. The cubic root of 25871239 is about 295.7597537743.

The spelling of 25871239 in words is "twenty-five million, eight hundred seventy-one thousand, two hundred thirty-nine".