25815060 has 72 divisors (see below), whose sum is σ = 78853320. Its totient is φ = 6835968.

The previous prime is 25815001. The next prime is 25815089. The reversal of 25815060 is 6051852.

It can be written as a sum of positive squares in 4 ways, for example, as 8225424 + 17589636 = 2868^2 + 4194^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30726 + ... + 31554.

It is an arithmetic number, because the mean of its divisors is an integer number (1095185).

Almost surely, 2^25815060 is an apocalyptic number.

25815060 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 25815060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39426660).

25815060 is an abundant number, since it is smaller than the sum of its proper divisors (53038260).

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

25815060 is a wasteful number, since it uses less digits than its factorization.

25815060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1012 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 25815060 is about 5080.8522907087. The cubic root of 25815060 is about 295.5455193691.

The spelling of 25815060 in words is "twenty-five million, eight hundred fifteen thousand, sixty".