25978571 has 2 divisors, whose sum is σ = 25978572. Its totient is φ = 25978570.

The previous prime is 25978553. The next prime is 25978573. The reversal of 25978571 is 17587952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25978571 - 2¹⁴ = 25962187 is a prime.

It is a super-3 number, since 3×25978571³ (a number of 23 digits) contains 333 as substring.

Together with 25978573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25978573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12989285 + 12989286.

It is an arithmetic number, because the mean of its divisors is an integer number (12989286).

Almost surely, 2^25978571 is an apocalyptic number.

25978571 is a deficient number, since it is larger than the sum of its proper divisors (1).

25978571 is an equidigital number, since it uses as much as digits as its factorization.

25978571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 44.

The square root of 25978571 is about 5096.9177941183. The cubic root of 25978571 is about 296.1681955881.

The spelling of 25978571 in words is "twenty-five million, nine hundred seventy-eight thousand, five hundred seventy-one".