25427520 has 196 divisors, whose sum is σ = 91615260. Its totient is φ = 6718464.

The previous prime is 25427513. The next prime is 25427531. The reversal of 25427520 is 2572452.

It can be written as a sum of positive squares in 2 ways, for example, as 13483584 + 11943936 = 3672^2 + 3456^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 233226 + ... + 233334.

Almost surely, 2^25427520 is an apocalyptic number.

25427520 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 25427520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45807630).

25427520 is an abundant number, since it is smaller than the sum of its proper divisors (66187740).

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

25427520 is an equidigital number, since it uses as much as digits as its factorization.

25427520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 25427520 is about 5042.5707729292. The cubic root of 25427520 is about 294.0591301309.

Adding to 25427520 its reverse (2572452), we get a palindrome (27999972).

The spelling of 25427520 in words is "twenty-five million, four hundred twenty-seven thousand, five hundred twenty".