3332721 has 16 divisors (see below), whose sum is σ = 5116928. Its totient is φ = 1890000.

The previous prime is 3332713. The next prime is 3332737. The reversal of 3332721 is 1272333.

It is not a de Polignac number, because 3332721 - 2³ = 3332713 is a prime.

It is a super-2 number, since 2×3332721² = 22214058527682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

3332721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3332741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2646 + ... + 3696.

It is an arithmetic number, because the mean of its divisors is an integer number (319808).

Almost surely, 2^3332721 is an apocalyptic number.

It is an amenable number.

3332721 is a deficient number, since it is larger than the sum of its proper divisors (1784207).

3332721 is a wasteful number, since it uses less digits than its factorization.

3332721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212.

The product of its digits is 756, while the sum is 21.

The square root of 3332721 is about 1825.5741562588. The cubic root of 3332721 is about 149.3710106134.

The spelling of 3332721 in words is "three million, three hundred thirty-two thousand, seven hundred twenty-one".