25389457 has 2 divisors, whose sum is σ = 25389458. Its totient is φ = 25389456.

The previous prime is 25389443. The next prime is 25389461. The reversal of 25389457 is 75498352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 379456 = 5001^2 + 616^2 .

It is a cyclic number.

It is not a de Polignac number, because 25389457 - 2¹⁵ = 25356689 is a prime.

It is not a weakly prime, because it can be changed into another prime (25389487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12694728 + 12694729.

It is an arithmetic number, because the mean of its divisors is an integer number (12694729).

Almost surely, 2^25389457 is an apocalyptic number.

It is an amenable number.

25389457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25389457 is an equidigital number, since it uses as much as digits as its factorization.

25389457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 43.

The square root of 25389457 is about 5038.7951932977. The cubic root of 25389457 is about 293.9123290506.

The spelling of 25389457 in words is "twenty-five million, three hundred eighty-nine thousand, four hundred fifty-seven".