25866401 has 8 divisors (see below), whose sum is σ = 29877984. Its totient is φ = 22131520.

The previous prime is 25866397. The next prime is 25866419. The reversal of 25866401 is 10466852.

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

It is a cyclic number.

It is not a de Polignac number, because 25866401 - 2² = 25866397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25866461) 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, 68975 + ... + 69348.

It is an arithmetic number, because the mean of its divisors is an integer number (3734748).

Almost surely, 2^25866401 is an apocalyptic number.

It is an amenable number.

25866401 is a deficient number, since it is larger than the sum of its proper divisors (4011583).

25866401 is a wasteful number, since it uses less digits than its factorization.

25866401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138351.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 25866401 is about 5085.9021815210. The cubic root of 25866401 is about 295.7413166352.

The spelling of 25866401 in words is "twenty-five million, eight hundred sixty-six thousand, four hundred one".