3506321 has 16 divisors (see below), whose sum is σ = 4402944. Its totient is φ = 2718144.

The previous prime is 3506297. The next prime is 3506323. The reversal of 3506321 is 1236053.

It is not a de Polignac number, because 3506321 - 2¹⁰ = 3505297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3506293 and 3506302.

It is not an unprimeable number, because it can be changed into a prime (3506323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4460 + ... + 5186.

It is an arithmetic number, because the mean of its divisors is an integer number (275184).

Almost surely, 2^3506321 is an apocalyptic number.

It is an amenable number.

3506321 is a deficient number, since it is larger than the sum of its proper divisors (896623).

3506321 is a wasteful number, since it uses less digits than its factorization.

3506321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 3506321 is about 1872.5172896398. The cubic root of 3506321 is about 151.9207949534.

The spelling of 3506321 in words is "three million, five hundred six thousand, three hundred twenty-one".