3580921 has 4 divisors (see below), whose sum is σ = 3586212. Its totient is φ = 3575632.

The previous prime is 3580919. The next prime is 3580943. The reversal of 3580921 is 1290853.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2958400 + 622521 = 1720^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 3580921 - 2¹ = 3580919 is a prime.

It is an Ulam number.

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 3580921.

It is not an unprimeable number, because it can be changed into a prime (3580901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450 + ... + 3043.

It is an arithmetic number, because the mean of its divisors is an integer number (896553).

Almost surely, 2^3580921 is an apocalyptic number.

It is an amenable number.

3580921 is a deficient number, since it is larger than the sum of its proper divisors (5291).

3580921 is an equidigital number, since it uses as much as digits as its factorization.

3580921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 3580921 is about 1892.3321590038. The cubic root of 3580921 is about 152.9906582930.

The spelling of 3580921 in words is "three million, five hundred eighty thousand, nine hundred twenty-one".