25974161 has 2 divisors, whose sum is σ = 25974162. Its totient is φ = 25974160.

The previous prime is 25974149. The next prime is 25974191. The reversal of 25974161 is 16147952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19749136 + 6225025 = 4444^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 25974161 - 2⁶ = 25974097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25974131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12987080 + 12987081.

It is an arithmetic number, because the mean of its divisors is an integer number (12987081).

Almost surely, 2^25974161 is an apocalyptic number.

It is an amenable number.

25974161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25974161 is an equidigital number, since it uses as much as digits as its factorization.

25974161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The square root of 25974161 is about 5096.4851613637. The cubic root of 25974161 is about 296.1514359332.

It can be divided in two parts, 25974 and 161, that multiplied together give a palindrome (4181814).

The spelling of 25974161 in words is "twenty-five million, nine hundred seventy-four thousand, one hundred sixty-one".