3521321 has 4 divisors (see below), whose sum is σ = 3634944. Its totient is φ = 3407700.

The previous prime is 3521303. The next prime is 3521341. The reversal of 3521321 is 1231253.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1231253 = 29 ⋅42457.

It is a cyclic number.

It is not a de Polignac number, because 3521321 - 2⁶ = 3521257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3521321.

It is not an unprimeable number, because it can be changed into a prime (3521341) 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 3 ways as a sum of consecutive naturals, for example, 56765 + ... + 56826.

It is an arithmetic number, because the mean of its divisors is an integer number (908736).

Almost surely, 2^3521321 is an apocalyptic number.

3521321 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3521321 is a deficient number, since it is larger than the sum of its proper divisors (113623).

3521321 is a wasteful number, since it uses less digits than its factorization.

3521321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113622.

The product of its digits is 180, while the sum is 17.

The square root of 3521321 is about 1876.5183185890. The cubic root of 3521321 is about 152.1371252179.

Adding to 3521321 its reverse (1231253), we get a palindrome (4752574).

The spelling of 3521321 in words is "three million, five hundred twenty-one thousand, three hundred twenty-one".