25452240 has 160 divisors (see below), whose sum is σ = 89137152. Its totient is φ = 5952000.

The previous prime is 25452223. The next prime is 25452257. The reversal of 25452240 is 4225452.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25452223) and next prime (25452257).

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

It is a self number, because there is not a number n which added to its sum of digits gives 25452240.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 81685 + ... + 81995.

Almost surely, 2^25452240 is an apocalyptic number.

25452240 is a gapful number since it is divisible by the number (20) 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 25452240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44568576).

25452240 is an abundant number, since it is smaller than the sum of its proper divisors (63684912).

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

25452240 is a wasteful number, since it uses less digits than its factorization.

25452240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 25452240 is about 5045.0213081810. The cubic root of 25452240 is about 294.1543915818.

Adding to 25452240 its reverse (4225452), we get a palindrome (29677692).

The spelling of 25452240 in words is "twenty-five million, four hundred fifty-two thousand, two hundred forty".