25399841 has 2 divisors, whose sum is σ = 25399842. Its totient is φ = 25399840.

The previous prime is 25399831. The next prime is 25399849. The reversal of 25399841 is 14899352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16638241 + 8761600 = 4079^2 + 2960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25399841 is a prime.

It is not a weakly prime, because it can be changed into another prime (25399849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12699920 + 12699921.

It is an arithmetic number, because the mean of its divisors is an integer number (12699921).

Almost surely, 2^25399841 is an apocalyptic number.

It is an amenable number.

25399841 is a deficient number, since it is larger than the sum of its proper divisors (1).

25399841 is an equidigital number, since it uses as much as digits as its factorization.

25399841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 25399841 is about 5039.8254930106. The cubic root of 25399841 is about 293.9523925258.

The spelling of 25399841 in words is "twenty-five million, three hundred ninety-nine thousand, eight hundred forty-one".