2739921 has 8 divisors (see below), whose sum is σ = 3812160. Its totient is φ = 1747152.

The previous prime is 2739899. The next prime is 2739931. The reversal of 2739921 is 1299372.

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

It is not a de Polignac number, because 2739921 - 2⁹ = 2739409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2739931) 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, 19786 + ... + 19923.

It is an arithmetic number, because the mean of its divisors is an integer number (476520).

2^2739921 is an apocalyptic number.

It is an amenable number.

2739921 is a deficient number, since it is larger than the sum of its proper divisors (1072239).

2739921 is a wasteful number, since it uses less digits than its factorization.

2739921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39735.

The product of its digits is 6804, while the sum is 33.

The square root of 2739921 is about 1655.2706727300. The cubic root of 2739921 is about 139.9305948497.

The spelling of 2739921 in words is "two million, seven hundred thirty-nine thousand, nine hundred twenty-one".