25921241 has 2 divisors, whose sum is σ = 25921242. Its totient is φ = 25921240.

The previous prime is 25921229. The next prime is 25921249. The reversal of 25921241 is 14212952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19009600 + 6911641 = 4360^2 + 2629^2 .

It is a cyclic number.

It is not a de Polignac number, because 25921241 - 2¹⁰ = 25920217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25921241.

It is not a weakly prime, because it can be changed into another prime (25921249) 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, 12960620 + 12960621.

It is an arithmetic number, because the mean of its divisors is an integer number (12960621).

Almost surely, 2^25921241 is an apocalyptic number.

It is an amenable number.

25921241 is a deficient number, since it is larger than the sum of its proper divisors (1).

25921241 is an equidigital number, since it uses as much as digits as its factorization.

25921241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 25921241 is about 5091.2907007948. The cubic root of 25921241 is about 295.9501719449.

It can be divided in two parts, 25921 and 241, that added together give a palindrome (26162).

The spelling of 25921241 in words is "twenty-five million, nine hundred twenty-one thousand, two hundred forty-one".