25632517 has 2 divisors, whose sum is σ = 25632518. Its totient is φ = 25632516.

The previous prime is 25632493. The next prime is 25632521. The reversal of 25632517 is 71523652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22268961 + 3363556 = 4719^2 + 1834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25632517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25632587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12816258 + 12816259.

It is an arithmetic number, because the mean of its divisors is an integer number (12816259).

Almost surely, 2^25632517 is an apocalyptic number.

It is an amenable number.

25632517 is a deficient number, since it is larger than the sum of its proper divisors (1).

25632517 is an equidigital number, since it uses as much as digits as its factorization.

25632517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 25632517 is about 5062.8566047243. The cubic root of 25632517 is about 294.8472521491.

The spelling of 25632517 in words is "twenty-five million, six hundred thirty-two thousand, five hundred seventeen".