2739321 has 18 divisors (see below), whose sum is σ = 4286958. Its totient is φ = 1684800.

The previous prime is 2739313. The next prime is 2739337. The reversal of 2739321 is 1239372.

It can be written as a sum of positive squares in 3 ways, for example, as 114921 + 2624400 = 339^2 + 1620^2 .

It is not a de Polignac number, because 2739321 - 2³ = 2739313 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2739371) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 621 + ... + 2421.

2^2739321 is an apocalyptic number.

It is an amenable number.

2739321 is a deficient number, since it is larger than the sum of its proper divisors (1547637).

2739321 is a wasteful number, since it uses less digits than its factorization.

2739321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1817 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 2739321 is about 1655.0894235660. The cubic root of 2739321 is about 139.9203798975.

The spelling of 2739321 in words is "two million, seven hundred thirty-nine thousand, three hundred twenty-one".