2591720 has 16 divisors (see below), whose sum is σ = 5831460. Its totient is φ = 1036672.

The previous prime is 2591717. The next prime is 2591731. The reversal of 2591720 is 271952.

It can be written as a sum of positive squares in 2 ways, for example, as 2477476 + 114244 = 1574^2 + 338^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2591720.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32357 + ... + 32436.

2^2591720 is an apocalyptic number.

2591720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2591720 is an abundant number, since it is smaller than the sum of its proper divisors (3239740).

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

2591720 is a wasteful number, since it uses less digits than its factorization.

2591720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64804 (or 64800 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2591720 is about 1609.8819832522. The cubic root of 2591720 is about 137.3607626322.

The spelling of 2591720 in words is "two million, five hundred ninety-one thousand, seven hundred twenty".