25964681 has 4 divisors (see below), whose sum is σ = 26057364. Its totient is φ = 25872000.

The previous prime is 25964671. The next prime is 25964683. The reversal of 25964681 is 18646952.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20748025 + 5216656 = 4555^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 25964681 - 2¹⁴ = 25948297 is a prime.

It is a super-2 number, since 2×25964681² = 1348329318863522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25964683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45920 + ... + 46481.

It is an arithmetic number, because the mean of its divisors is an integer number (6514341).

Almost surely, 2^25964681 is an apocalyptic number.

It is an amenable number.

25964681 is a deficient number, since it is larger than the sum of its proper divisors (92683).

25964681 is an equidigital number, since it uses as much as digits as its factorization.

25964681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92682.

The product of its digits is 103680, while the sum is 41.

The square root of 25964681 is about 5095.5550237437. Note that the first 3 decimals coincide. The cubic root of 25964681 is about 296.1154019526.

The spelling of 25964681 in words is "twenty-five million, nine hundred sixty-four thousand, six hundred eighty-one".