3294721 has 4 divisors (see below), whose sum is σ = 3327444. Its totient is φ = 3262000.

The previous prime is 3294701. The next prime is 3294749. The reversal of 3294721 is 1274923.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2686321 + 608400 = 1639^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 3294721 - 2⁵ = 3294689 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3294721.

It is not an unprimeable number, because it can be changed into a prime (3294701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16210 + ... + 16411.

It is an arithmetic number, because the mean of its divisors is an integer number (831861).

Almost surely, 2^3294721 is an apocalyptic number.

It is an amenable number.

3294721 is a deficient number, since it is larger than the sum of its proper divisors (32723).

3294721 is a wasteful number, since it uses less digits than its factorization.

3294721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32722.

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

The square root of 3294721 is about 1815.1366339755. The cubic root of 3294721 is about 148.8011250011.

It can be divided in two parts, 329 and 4721, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 3294721 in words is "three million, two hundred ninety-four thousand, seven hundred twenty-one".