25682369 has 8 divisors (see below), whose sum is σ = 26327592. Its totient is φ = 25043200.

The previous prime is 25682339. The next prime is 25682387. The reversal of 25682369 is 96328652.

It can be written as a sum of positive squares in 4 ways, for example, as 11992369 + 13690000 = 3463^2 + 3700^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25682369 is a prime.

It is a super-2 number, since 2×25682369² = 1319168154904322, 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 (25682339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7769 + ... + 10569.

It is an arithmetic number, because the mean of its divisors is an integer number (3290949).

Almost surely, 2^25682369 is an apocalyptic number.

It is an amenable number.

25682369 is a deficient number, since it is larger than the sum of its proper divisors (645223).

25682369 is a wasteful number, since it uses less digits than its factorization.

25682369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027.

The product of its digits is 155520, while the sum is 41.

The square root of 25682369 is about 5067.7775207679. Note that the first 3 decimals coincide. The cubic root of 25682369 is about 295.0382752214.

It can be divided in two parts, 256 and 82369, that multiplied together give a square (21086464 = 4592²).

The spelling of 25682369 in words is "twenty-five million, six hundred eighty-two thousand, three hundred sixty-nine".