25340520 has 64 divisors (see below), whose sum is σ = 77656320. Its totient is φ = 6612224.

The previous prime is 25340507. The next prime is 25340551. The reversal of 25340520 is 2504352.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3394 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (1213380).

Almost surely, 2^25340520 is an apocalyptic number.

25340520 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 25340520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38828160).

25340520 is an abundant number, since it is smaller than the sum of its proper divisors (52315800).

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

25340520 is a wasteful number, since it uses less digits than its factorization.

25340520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554 (or 4550 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 25340520 is about 5033.9368291626. The cubic root of 25340520 is about 293.7233734731.

Adding to 25340520 its reverse (2504352), we get a palindrome (27844872).

The spelling of 25340520 in words is "twenty-five million, three hundred forty thousand, five hundred twenty".