2645321 has 8 divisors (see below), whose sum is σ = 3051840. Its totient is φ = 2245968.

The previous prime is 2645311. The next prime is 2645329. The reversal of 2645321 is 1235462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2645321 - 2⁶ = 2645257 is a prime.

It is a d-powerful number, because it can be written as 2 + 6³ + 4⁷ + 5³ + 3¹² + 2²¹ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971 + ... + 2496.

It is an arithmetic number, because the mean of its divisors is an integer number (381480).

2^2645321 is an apocalyptic number.

It is an amenable number.

2645321 is a deficient number, since it is larger than the sum of its proper divisors (406519).

2645321 is a wasteful number, since it uses less digits than its factorization.

2645321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583.

The product of its digits is 1440, while the sum is 23.

The square root of 2645321 is about 1626.4442812467. Note that the first 3 decimals coincide. The cubic root of 2645321 is about 138.3012567358.

The spelling of 2645321 in words is "two million, six hundred forty-five thousand, three hundred twenty-one".