25512432 has 80 divisors (see below), whose sum is σ = 72554880. Its totient is φ = 7660800.

The previous prime is 25512413. The next prime is 25512433. The reversal of 25512432 is 23421552.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25512433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111294 + ... + 111522.

It is an arithmetic number, because the mean of its divisors is an integer number (906936).

Almost surely, 2^25512432 is an apocalyptic number.

25512432 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 25512432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36277440).

25512432 is an abundant number, since it is smaller than the sum of its proper divisors (47042448).

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

25512432 is a wasteful number, since it uses less digits than its factorization.

25512432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 456 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 25512432 is about 5050.9832706118. The cubic root of 25512432 is about 294.3860909268.

Adding to 25512432 its reverse (23421552), we get a palindrome (48933984).

The spelling of 25512432 in words is "twenty-five million, five hundred twelve thousand, four hundred thirty-two".