3361721 has 4 divisors (see below), whose sum is σ = 3667344. Its totient is φ = 3056100.

The previous prime is 3361679. The next prime is 3361739. The reversal of 3361721 is 1271633.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1271633 = 11 ⋅115603.

It is a cyclic number.

It is not a de Polignac number, because 3361721 - 2¹⁰ = 3360697 is a prime.

It is a super-2 number, since 2×3361721² = 22602336163682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3361741) 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 3 ways as a sum of consecutive naturals, for example, 152795 + ... + 152816.

It is an arithmetic number, because the mean of its divisors is an integer number (916836).

Almost surely, 2^3361721 is an apocalyptic number.

It is an amenable number.

3361721 is a deficient number, since it is larger than the sum of its proper divisors (305623).

3361721 is a wasteful number, since it uses less digits than its factorization.

3361721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305622.

The product of its digits is 756, while the sum is 23.

The square root of 3361721 is about 1833.4996591219. The cubic root of 3361721 is about 149.8030155014.

The spelling of 3361721 in words is "three million, three hundred sixty-one thousand, seven hundred twenty-one".