25900961 has 2 divisors, whose sum is σ = 25900962. Its totient is φ = 25900960.

The previous prime is 25900951. The next prime is 25900981. The reversal of 25900961 is 16900952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24690961 + 1210000 = 4969^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 25900961 - 2¹⁴ = 25884577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25900951) 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, 12950480 + 12950481.

It is an arithmetic number, because the mean of its divisors is an integer number (12950481).

Almost surely, 2^25900961 is an apocalyptic number.

It is an amenable number.

25900961 is a deficient number, since it is larger than the sum of its proper divisors (1).

25900961 is an equidigital number, since it uses as much as digits as its factorization.

25900961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 25900961 is about 5089.2986746702. The cubic root of 25900961 is about 295.8729709678.

Subtracting from 25900961 its reverse (16900952), we obtain a palindrome (9000009).

The spelling of 25900961 in words is "twenty-five million, nine hundred thousand, nine hundred sixty-one".