25827491 has 2 divisors, whose sum is σ = 25827492. Its totient is φ = 25827490.

The previous prime is 25827481. The next prime is 25827521. The reversal of 25827491 is 19472852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25827491 - 2¹⁰ = 25826467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25827421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12913745 + 12913746.

It is an arithmetic number, because the mean of its divisors is an integer number (12913746).

Almost surely, 2^25827491 is an apocalyptic number.

25827491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25827491 is an equidigital number, since it uses as much as digits as its factorization.

25827491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 25827491 is about 5082.0754618561. The cubic root of 25827491 is about 295.5929508141.

The spelling of 25827491 in words is "twenty-five million, eight hundred twenty-seven thousand, four hundred ninety-one".