25252520 has 64 divisors (see below), whose sum is σ = 60480000. Its totient is φ = 9462528.

The previous prime is 25252457. The next prime is 25252529. The reversal of 25252520 is 2525252.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25252529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113129 + ... + 113351.

It is an arithmetic number, because the mean of its divisors is an integer number (945000).

Almost surely, 2^25252520 is an apocalyptic number.

25252520 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 25252520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30240000).

25252520 is an abundant number, since it is smaller than the sum of its proper divisors (35227480).

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

25252520 is a wasteful number, since it uses less digits than its factorization.

25252520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 25252520 is about 5025.1885536764. The cubic root of 25252520 is about 293.3829748401.

Adding to 25252520 its reverse (2525252), we get a palindrome (27777772).

The spelling of 25252520 in words is "twenty-five million, two hundred fifty-two thousand, five hundred twenty".