2721349 has 4 divisors (see below), whose sum is σ = 2727936. Its totient is φ = 2714764.

The previous prime is 2721319. The next prime is 2721371. The reversal of 2721349 is 9431272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2721349 - 2⁵ = 2721317 is a prime.

It is an Ulam number.

It is a Duffinian number.

2721349 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721319) 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, 2629 + ... + 3514.

It is an arithmetic number, because the mean of its divisors is an integer number (681984).

2^2721349 is an apocalyptic number.

It is an amenable number.

2721349 is a deficient number, since it is larger than the sum of its proper divisors (6587).

2721349 is an equidigital number, since it uses as much as digits as its factorization.

2721349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586.

The product of its digits is 3024, while the sum is 28.

The square root of 2721349 is about 1649.6511752489. The cubic root of 2721349 is about 139.6137140573.

The spelling of 2721349 in words is "two million, seven hundred twenty-one thousand, three hundred forty-nine".