25446 has 8 divisors (see below), whose sum is σ = 50904. Its totient is φ = 8480.

The previous prime is 25439. The next prime is 25447. The reversal of 25446 is 64452.

It is a happy number.

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

25446 is an admirable number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25447) 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, 2115 + ... + 2126.

It is an arithmetic number, because the mean of its divisors is an integer number (6363).

2²⁵⁴⁴⁶ is an apocalyptic number.

25446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25452).

25446 is a wasteful number, since it uses less digits than its factorization.

25446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246.

The product of its digits is 960, while the sum is 21.

The square root of 25446 is about 159.5180240600. The cubic root of 25446 is about 29.4130350824.

Subtracting from 25446 its sum of digits (21), we obtain a triangular number (25425 = T₂₂₅).

Adding to 25446 its reverse (64452), we get a palindrome (89898).

It can be divided in two parts, 254 and 46, that added together give a triangular number (300 = T₂₄).

The spelling of 25446 in words is "twenty-five thousand, four hundred forty-six".