25634761 has 2 divisors, whose sum is σ = 25634762. Its totient is φ = 25634760.

The previous prime is 25634731. The next prime is 25634771. The reversal of 25634761 is 16743652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21855625 + 3779136 = 4675^2 + 1944^2 .

It is a cyclic number.

It is not a de Polignac number, because 25634761 - 2¹¹ = 25632713 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (25634731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12817380 + 12817381.

It is an arithmetic number, because the mean of its divisors is an integer number (12817381).

Almost surely, 2^25634761 is an apocalyptic number.

It is an amenable number.

25634761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25634761 is an equidigital number, since it uses as much as digits as its factorization.

25634761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 25634761 is about 5063.0782138932. The cubic root of 25634761 is about 294.8558560372.

The spelling of 25634761 in words is "twenty-five million, six hundred thirty-four thousand, seven hundred sixty-one".