25432 has 24 divisors (see below), whose sum is σ = 55260. Its totient is φ = 10880.

The previous prime is 25423. The next prime is 25439. The reversal of 25432 is 23452.

It is a d-powerful number, because it can be written as 2 + 5³ + 4⁷ + 3⁶ + 2¹³ .

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

Its product of digits (240) is a multiple of the sum of its prime divisors (30).

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 (25439) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1488 + ... + 1504.

2²⁵⁴³² is an apocalyptic number.

25432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27630).

25432 is an abundant number, since it is smaller than the sum of its proper divisors (29828).

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

25432 is a wasteful number, since it uses less digits than its factorization.

25432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51 (or 30 counting only the distinct ones).

The product of its digits is 240, while the sum is 16.

The square root of 25432 is about 159.4741358340. The cubic root of 25432 is about 29.4076398921.

Adding to 25432 its reverse (23452), we get a palindrome (48884).

It can be divided in two parts, 254 and 32, that multiplied together give a triangular number (8128 = T₁₂₇).

The spelling of 25432 in words is "twenty-five thousand, four hundred thirty-two".