25418 has 8 divisors (see below), whose sum is σ = 38880. Its totient is φ = 12460.

The previous prime is 25411. The next prime is 25423. The reversal of 25418 is 81452.

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

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

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 25418.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25418.

It is not an unprimeable number, because it can be changed into a prime (25411) by changing a digit.

25418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53 + ... + 231.

It is an arithmetic number, because the mean of its divisors is an integer number (4860).

2²⁵⁴¹⁸ is an apocalyptic number.

25418 is a deficient number, since it is larger than the sum of its proper divisors (13462).

25418 is a wasteful number, since it uses less digits than its factorization.

25418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252.

The product of its digits is 320, while the sum is 20.

The square root of 25418 is about 159.4302355264. The cubic root of 25418 is about 29.4022427215.

It can be divided in two parts, 254 and 18, that added together give a palindrome (272).

The spelling of 25418 in words is "twenty-five thousand, four hundred eighteen".