3321981 has 12 divisors (see below), whose sum is σ = 5167708. Its totient is φ = 2044224.

The previous prime is 3321977. The next prime is 3322001. The reversal of 3321981 is 1891233.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 1265625 = 1434^2 + 1125^2 .

It is not a de Polignac number, because 3321981 - 2² = 3321977 is a prime.

It is a super-2 number, since 2×3321981² = 22071115528722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3321911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14080 + ... + 14313.

Almost surely, 2^3321981 is an apocalyptic number.

It is an amenable number.

3321981 is a deficient number, since it is larger than the sum of its proper divisors (1845727).

3321981 is a wasteful number, since it uses less digits than its factorization.

3321981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28412 (or 28409 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 3321981 is about 1822.6302422598. The cubic root of 3321981 is about 149.2103840042.

The spelling of 3321981 in words is "three million, three hundred twenty-one thousand, nine hundred eighty-one".