3305921 has 4 divisors (see below), whose sum is σ = 3319344. Its totient is φ = 3292500.

The previous prime is 3305917. The next prime is 3305923. The reversal of 3305921 is 1295033.

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.

It is a cyclic number.

It is not a de Polignac number, because 3305921 - 2² = 3305917 is a prime.

It is a super-2 number, since 2×3305921² = 21858227316482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3305923) 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, 6335 + ... + 6836.

It is an arithmetic number, because the mean of its divisors is an integer number (829836).

Almost surely, 2^3305921 is an apocalyptic number.

It is an amenable number.

3305921 is a deficient number, since it is larger than the sum of its proper divisors (13423).

3305921 is a wasteful number, since it uses less digits than its factorization.

3305921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13422.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 3305921 is about 1818.2191837070. The cubic root of 3305921 is about 148.9695446966.

The spelling of 3305921 in words is "three million, three hundred five thousand, nine hundred twenty-one".