25143424 has 32 divisors (see below), whose sum is σ = 51453900. Its totient is φ = 12229632.

The previous prime is 25143413. The next prime is 25143427. The reversal of 25143424 is 42434152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24681024 + 462400 = 4968^2 + 680^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (25143427) 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, 2082 + ... + 7390.

Almost surely, 2^25143424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25143424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25726950).

25143424 is an abundant number, since it is smaller than the sum of its proper divisors (26310476).

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

25143424 is an equidigital number, since it uses as much as digits as its factorization.

25143424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360 (or 5348 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 25143424 is about 5014.3218883514. The cubic root of 25143424 is about 292.9598736726.

Adding to 25143424 its reverse (42434152), we get a palindrome (67577576).

The spelling of 25143424 in words is "twenty-five million, one hundred forty-three thousand, four hundred twenty-four".