25257541 has 2 divisors, whose sum is σ = 25257542. Its totient is φ = 25257540.

The previous prime is 25257527. The next prime is 25257553. The reversal of 25257541 is 14575252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22944100 + 2313441 = 4790^2 + 1521^2 .

It is a cyclic number.

It is not a de Polignac number, because 25257541 - 2⁵ = 25257509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25257571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12628770 + 12628771.

It is an arithmetic number, because the mean of its divisors is an integer number (12628771).

Almost surely, 2^25257541 is an apocalyptic number.

It is an amenable number.

25257541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25257541 is an equidigital number, since it uses as much as digits as its factorization.

25257541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14000, while the sum is 31.

The square root of 25257541 is about 5025.6881120897. The cubic root of 25257541 is about 293.4024181576.

The spelling of 25257541 in words is "twenty-five million, two hundred fifty-seven thousand, five hundred forty-one".