25451 has 4 divisors (see below), whose sum is σ = 26304. Its totient is φ = 24600.

The previous prime is 25447. The next prime is 25453. The reversal of 25451 is 15452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25451 - 2² = 25447 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25451.

It is not an unprimeable number, because it can be changed into a prime (25453) 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, 380 + ... + 441.

It is an arithmetic number, because the mean of its divisors is an integer number (6576).

2²⁵⁴⁵¹ is an apocalyptic number.

25451 is a deficient number, since it is larger than the sum of its proper divisors (853).

25451 is an equidigital number, since it uses as much as digits as its factorization.

25451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852.

The product of its digits is 200, while the sum is 17.

The square root of 25451 is about 159.5336955004. The cubic root of 25451 is about 29.4149614565.

Adding to 25451 its product of digits (200), we get a triangular number (25651 = T₂₂₆).

Subtracting from 25451 its reverse (15452), we obtain a palindrome (9999).

The spelling of 25451 in words is "twenty-five thousand, four hundred fifty-one".