25440659 has 2 divisors, whose sum is σ = 25440660. Its totient is φ = 25440658.

The previous prime is 25440647. The next prime is 25440661. The reversal of 25440659 is 95604452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25440659 - 2⁸ = 25440403 is a prime.

It is a super-3 number, since 3×25440659³ (a number of 23 digits) contains 333 as substring.

Together with 25440661, 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 (25449659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720329 + 12720330.

It is an arithmetic number, because the mean of its divisors is an integer number (12720330).

Almost surely, 2^25440659 is an apocalyptic number.

25440659 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440659 is an equidigital number, since it uses as much as digits as its factorization.

25440659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 25440659 is about 5043.8734123687. The cubic root of 25440659 is about 294.1097705083.

The spelling of 25440659 in words is "twenty-five million, four hundred forty thousand, six hundred fifty-nine".