25638241 has 2 divisors, whose sum is σ = 25638242. Its totient is φ = 25638240.

The previous prime is 25638211. The next prime is 25638251. The reversal of 25638241 is 14283652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16638241 + 9000000 = 4079^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 25638241 - 2¹⁷ = 25507169 is a prime.

It is not a weakly prime, because it can be changed into another prime (25638211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12819120 + 12819121.

It is an arithmetic number, because the mean of its divisors is an integer number (12819121).

Almost surely, 2^25638241 is an apocalyptic number.

It is an amenable number.

25638241 is a deficient number, since it is larger than the sum of its proper divisors (1).

25638241 is an equidigital number, since it uses as much as digits as its factorization.

25638241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 25638241 is about 5063.4218666826. The cubic root of 25638241 is about 294.8691979723.

The spelling of 25638241 in words is "twenty-five million, six hundred thirty-eight thousand, two hundred forty-one".