25682381 has 4 divisors (see below), whose sum is σ = 25936764. Its totient is φ = 25428000.

The previous prime is 25682339. The next prime is 25682387. The reversal of 25682381 is 18328652.

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 15015625 + 10666756 = 3875^2 + 3266^2 .

It is a cyclic number.

It is not a de Polignac number, because 25682381 - 2¹⁸ = 25420237 is a prime.

It is a super-2 number, since 2×25682381² = 1319169387658322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25682387) 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, 127040 + ... + 127241.

It is an arithmetic number, because the mean of its divisors is an integer number (6484191).

Almost surely, 2^25682381 is an apocalyptic number.

It is an amenable number.

25682381 is a deficient number, since it is larger than the sum of its proper divisors (254383).

25682381 is a wasteful number, since it uses less digits than its factorization.

25682381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254382.

The product of its digits is 23040, while the sum is 35.

The square root of 25682381 is about 5067.7787047187. The cubic root of 25682381 is about 295.0383211733.

The spelling of 25682381 in words is "twenty-five million, six hundred eighty-two thousand, three hundred eighty-one".