2565720 has 48 divisors (see below), whose sum is σ = 8339760. Its totient is φ = 684096.

The previous prime is 2565713. The next prime is 2565757. The reversal of 2565720 is 275652.

2565720 is a `hidden beast` number, since 2 + 5 + 657 + 2 + 0 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3204 + ... + 3923.

It is an arithmetic number, because the mean of its divisors is an integer number (173745).

2^2565720 is an apocalyptic number.

2565720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565720 is an abundant number, since it is smaller than the sum of its proper divisors (5774040).

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

2565720 is a wasteful number, since it uses less digits than its factorization.

2565720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144 (or 7137 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 2565720 is about 1601.7865026276. The cubic root of 2565720 is about 136.8998860111.

The spelling of 2565720 in words is "two million, five hundred sixty-five thousand, seven hundred twenty".