3321681 has 32 divisors (see below), whose sum is σ = 5308416. Its totient is φ = 1824000.

The previous prime is 3321679. The next prime is 3321709. The reversal of 3321681 is 1861233.

It is not a de Polignac number, because 3321681 - 2¹ = 3321679 is a prime.

It is a super-2 number, since 2×3321681² = 22067129331522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3321611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17296 + ... + 17486.

It is an arithmetic number, because the mean of its divisors is an integer number (165888).

Almost surely, 2^3321681 is an apocalyptic number.

3321681 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3321681 is a deficient number, since it is larger than the sum of its proper divisors (1986735).

3321681 is a wasteful number, since it uses less digits than its factorization.

3321681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253.

The product of its digits is 864, while the sum is 24.

The square root of 3321681 is about 1822.5479417563. The cubic root of 3321681 is about 149.2058922604.

The spelling of 3321681 in words is "three million, three hundred twenty-one thousand, six hundred eighty-one".