25128841 has 2 divisors, whose sum is σ = 25128842. Its totient is φ = 25128840.

The previous prime is 25128823. The next prime is 25128853. The reversal of 25128841 is 14882152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20967241 + 4161600 = 4579^2 + 2040^2 .

It is a cyclic number.

It is not a de Polignac number, because 25128841 - 2²³ = 16740233 is a prime.

It is not a weakly prime, because it can be changed into another prime (25128881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12564420 + 12564421.

It is an arithmetic number, because the mean of its divisors is an integer number (12564421).

Almost surely, 2^25128841 is an apocalyptic number.

It is an amenable number.

25128841 is a deficient number, since it is larger than the sum of its proper divisors (1).

25128841 is an equidigital number, since it uses as much as digits as its factorization.

25128841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120, while the sum is 31.

The square root of 25128841 is about 5012.8675426347. The cubic root of 25128841 is about 292.9032245324.

It can be divided in two parts, 251 and 28841, that added together give a palindrome (29092).

The spelling of 25128841 in words is "twenty-five million, one hundred twenty-eight thousand, eight hundred forty-one".