3321657 has 12 divisors (see below), whose sum is σ = 4832100. Its totient is φ = 2198688.

The previous prime is 3321653. The next prime is 3321667. The reversal of 3321657 is 7561233.

It is a happy number.

3321657 is a `hidden beast` number, since 3 + 3 + 2 + 1 + 657 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 962361 + 2359296 = 981^2 + 1536^2 .

It is not a de Polignac number, because 3321657 - 2² = 3321653 is a prime.

It is a super-2 number, since 2×3321657² = 22066810451298, which contains 22 as substring.

3321657 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3321657.

It is not an unprimeable number, because it can be changed into a prime (3321653) 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 11 ways as a sum of consecutive naturals, for example, 103 + ... + 2579.

It is an arithmetic number, because the mean of its divisors is an integer number (402675).

Almost surely, 2^3321657 is an apocalyptic number.

It is an amenable number.

3321657 is a deficient number, since it is larger than the sum of its proper divisors (1510443).

3321657 is a wasteful number, since it uses less digits than its factorization.

3321657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632 (or 2629 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 3321657 is about 1822.5413575554. The cubic root of 3321657 is about 149.2055329092.

The spelling of 3321657 in words is "three million, three hundred twenty-one thousand, six hundred fifty-seven".