2583721 has 12 divisors (see below), whose sum is σ = 3054288. Its totient is φ = 2178792.

The previous prime is 2583719. The next prime is 2583727. The reversal of 2583721 is 1273852.

It is not a de Polignac number, because 2583721 - 2¹ = 2583719 is a prime.

It is a super-2 number, since 2×2583721² = 13351228411682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2583721.

It is not an unprimeable number, because it can be changed into a prime (2583727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2890 + ... + 3676.

It is an arithmetic number, because the mean of its divisors is an integer number (254524).

2^2583721 is an apocalyptic number.

It is an amenable number.

2583721 is a deficient number, since it is larger than the sum of its proper divisors (470567).

2583721 is an equidigital number, since it uses as much as digits as its factorization.

2583721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 861 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 2583721 is about 1607.3957197902. The cubic root of 2583721 is about 137.2193017409.

The spelling of 2583721 in words is "two million, five hundred eighty-three thousand, seven hundred twenty-one".