3223921 has 4 divisors (see below), whose sum is σ = 3311092. Its totient is φ = 3136752.

The previous prime is 3223919. The next prime is 3223943. The reversal of 3223921 is 1293223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1293223 = 83 ⋅15581.

It can be written as a sum of positive squares in 2 ways, for example, as 2433600 + 790321 = 1560^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 3223921 - 2¹ = 3223919 is a prime.

It is a super-2 number, since 2×3223921² = 20787333228482, which contains 22 as substring.

It is a Duffinian number.

3223921 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3223892 and 3223901.

It is not an unprimeable number, because it can be changed into a prime (3223991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43530 + ... + 43603.

It is an arithmetic number, because the mean of its divisors is an integer number (827773).

Almost surely, 2^3223921 is an apocalyptic number.

It is an amenable number.

3223921 is a deficient number, since it is larger than the sum of its proper divisors (87171).

3223921 is an equidigital number, since it uses as much as digits as its factorization.

3223921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87170.

The product of its digits is 648, while the sum is 22.

The square root of 3223921 is about 1795.5280560325. The cubic root of 3223921 is about 147.7275392615.

The spelling of 3223921 in words is "three million, two hundred twenty-three thousand, nine hundred twenty-one".