3580721 has 4 divisors (see below), whose sum is σ = 3769200. Its totient is φ = 3392244.

The previous prime is 3580697. The next prime is 3580747. The reversal of 3580721 is 1270853.

3580721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3580721 - 2⁶ = 3580657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3580751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94211 + ... + 94248.

It is an arithmetic number, because the mean of its divisors is an integer number (942300).

Almost surely, 2^3580721 is an apocalyptic number.

It is an amenable number.

3580721 is a deficient number, since it is larger than the sum of its proper divisors (188479).

3580721 is a wasteful number, since it uses less digits than its factorization.

3580721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188478.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 3580721 is about 1892.2793134207. The cubic root of 3580721 is about 152.9878099847.

The spelling of 3580721 in words is "three million, five hundred eighty thousand, seven hundred twenty-one".