25394081 has 4 divisors (see below), whose sum is σ = 25413012. Its totient is φ = 25375152.

The previous prime is 25394077. The next prime is 25394087. The reversal of 25394081 is 18049352.

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 14371681 + 11022400 = 3791^2 + 3320^2 .

It is a cyclic number.

It is not a de Polignac number, because 25394081 - 2² = 25394077 is a prime.

It is a super-2 number, since 2×25394081² = 1289718699669122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25394087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7286 + ... + 10191.

It is an arithmetic number, because the mean of its divisors is an integer number (6353253).

Almost surely, 2^25394081 is an apocalyptic number.

It is an amenable number.

25394081 is a deficient number, since it is larger than the sum of its proper divisors (18931).

25394081 is a wasteful number, since it uses less digits than its factorization.

25394081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18930.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 25394081 is about 5039.2540122522. The cubic root of 25394081 is about 293.9301706835.

The spelling of 25394081 in words is "twenty-five million, three hundred ninety-four thousand, eighty-one".