25642260 has 144 divisors (see below), whose sum is σ = 90994176. Its totient is φ = 5723136.

The previous prime is 25642249. The next prime is 25642277. The reversal of 25642260 is 6224652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59004 + ... + 59436.

It is an arithmetic number, because the mean of its divisors is an integer number (631904).

Almost surely, 2^25642260 is an apocalyptic number.

25642260 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 25642260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45497088).

25642260 is an abundant number, since it is smaller than the sum of its proper divisors (65351916).

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

25642260 is a wasteful number, since it uses less digits than its factorization.

25642260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 25642260 is about 5063.8187171343. The cubic root of 25642260 is about 294.8846048716.

The spelling of 25642260 in words is "twenty-five million, six hundred forty-two thousand, two hundred sixty".