25961817 has 12 divisors (see below), whose sum is σ = 40267536. Its totient is φ = 14835240.

The previous prime is 25961801. The next prime is 25961833. The reversal of 25961817 is 71816952.

It is an interprime number because it is at equal distance from previous prime (25961801) and next prime (25961833).

It is not a de Polignac number, because 25961817 - 2⁴ = 25961801 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25961857) 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 in 11 ways as a sum of consecutive naturals, for example, 88159 + ... + 88452.

It is an arithmetic number, because the mean of its divisors is an integer number (3355628).

Almost surely, 2^25961817 is an apocalyptic number.

It is an amenable number.

25961817 is a deficient number, since it is larger than the sum of its proper divisors (14305719).

25961817 is a wasteful number, since it uses less digits than its factorization.

25961817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176628 (or 176621 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 25961817 is about 5095.2739867450. The cubic root of 25961817 is about 296.1045140122.

The spelling of 25961817 in words is "twenty-five million, nine hundred sixty-one thousand, eight hundred seventeen".