2739221 has 8 divisors (see below), whose sum is σ = 2844984. Its totient is φ = 2635200.

The previous prime is 2739203. The next prime is 2739223. The reversal of 2739221 is 1229372.

It can be written as a sum of positive squares in 4 ways, for example, as 2436721 + 302500 = 1561^2 + 550^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2739221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2739223) 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, 3371 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (355623).

2^2739221 is an apocalyptic number.

It is an amenable number.

2739221 is a deficient number, since it is larger than the sum of its proper divisors (105763).

2739221 is a wasteful number, since it uses less digits than its factorization.

2739221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871.

The product of its digits is 1512, while the sum is 26.

The square root of 2739221 is about 1655.0592134422. The cubic root of 2739221 is about 139.9186772605.

The spelling of 2739221 in words is "two million, seven hundred thirty-nine thousand, two hundred twenty-one".