25696381 has 4 divisors (see below), whose sum is σ = 26323164. Its totient is φ = 25069600.

The previous prime is 25696373. The next prime is 25696397. The reversal of 25696381 is 18369652.

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 7128900 + 18567481 = 2670^2 + 4309^2 .

It is a cyclic number.

It is not a de Polignac number, because 25696381 - 2³ = 25696373 is a prime.

It is a super-2 number, since 2×25696381² = 1320607992994322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25696301) 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 3 ways as a sum of consecutive naturals, for example, 313330 + ... + 313411.

It is an arithmetic number, because the mean of its divisors is an integer number (6580791).

Almost surely, 2^25696381 is an apocalyptic number.

It is an amenable number.

25696381 is a deficient number, since it is larger than the sum of its proper divisors (626783).

25696381 is an equidigital number, since it uses as much as digits as its factorization.

25696381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626782.

The product of its digits is 77760, while the sum is 40.

The square root of 25696381 is about 5069.1597923127. The cubic root of 25696381 is about 295.0919219431.

The spelling of 25696381 in words is "twenty-five million, six hundred ninety-six thousand, three hundred eighty-one".