3340721 has 8 divisors (see below), whose sum is σ = 3624264. Its totient is φ = 3066880.

The previous prime is 3340709. The next prime is 3340723. The reversal of 3340721 is 1270433.

It can be written as a sum of positive squares in 4 ways, for example, as 664225 + 2676496 = 815^2 + 1636^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3340721 - 2⁶ = 3340657 is a prime.

It is a super-2 number, since 2×3340721² = 22320833599682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3340693 and 3340702.

It is not an unprimeable number, because it can be changed into a prime (3340723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700 + ... + 3093.

It is an arithmetic number, because the mean of its divisors is an integer number (453033).

Almost surely, 2^3340721 is an apocalyptic number.

It is an amenable number.

3340721 is a deficient number, since it is larger than the sum of its proper divisors (283543).

3340721 is a wasteful number, since it uses less digits than its factorization.

3340721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4851.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 3340721 is about 1827.7639344292. The cubic root of 3340721 is about 149.4904338722.

The spelling of 3340721 in words is "three million, three hundred forty thousand, seven hundred twenty-one".