25725457 has 2 divisors, whose sum is σ = 25725458. Its totient is φ = 25725456.

The previous prime is 25725451. The next prime is 25725461. The reversal of 25725457 is 75452752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24295041 + 1430416 = 4929^2 + 1196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25725457 is a prime.

It is not a weakly prime, because it can be changed into another prime (25725451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12862728 + 12862729.

It is an arithmetic number, because the mean of its divisors is an integer number (12862729).

Almost surely, 2^25725457 is an apocalyptic number.

It is an amenable number.

25725457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25725457 is an equidigital number, since it uses as much as digits as its factorization.

25725457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98000, while the sum is 37.

The square root of 25725457 is about 5072.0269123892. The cubic root of 25725457 is about 295.2031809121.

The spelling of 25725457 in words is "twenty-five million, seven hundred twenty-five thousand, four hundred fifty-seven".