25571279 has 2 divisors, whose sum is σ = 25571280. Its totient is φ = 25571278.

The previous prime is 25571269. The next prime is 25571297. The reversal of 25571279 is 97217552.

Together with next prime (25571297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25571279 - 2⁴ = 25571263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25571219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12785639 + 12785640.

It is an arithmetic number, because the mean of its divisors is an integer number (12785640).

Almost surely, 2^25571279 is an apocalyptic number.

25571279 is a deficient number, since it is larger than the sum of its proper divisors (1).

25571279 is an equidigital number, since it uses as much as digits as its factorization.

25571279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44100, while the sum is 38.

The square root of 25571279 is about 5056.8052167352. The cubic root of 25571279 is about 294.6122608674.

It can be divided in two parts, 2557 and 1279, that multiplied together give a triangular number (3270403 = T₂₅₅₇).

The spelling of 25571279 in words is "twenty-five million, five hundred seventy-one thousand, two hundred seventy-nine".