25457 has 2 divisors, whose sum is σ = 25458. Its totient is φ = 25456.

The previous prime is 25453. The next prime is 25463. The reversal of 25457 is 75452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14641 + 10816 = 121^2 + 104^2 .

It is a cyclic number.

It is not a de Polignac number, because 25457 - 2² = 25453 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25457.

It is not a weakly prime, because it can be changed into another prime (25453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12728 + 12729.

It is an arithmetic number, because the mean of its divisors is an integer number (12729).

2²⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

25457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25457 is an equidigital number, since it uses as much as digits as its factorization.

25457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 23.

The square root of 25457 is about 159.5524991970. The cubic root of 25457 is about 29.4172727723.

It can be divided in two parts, 2545 and 7, that added together give a palindrome (2552).

The spelling of 25457 in words is "twenty-five thousand, four hundred fifty-seven".