3453221 has 4 divisors (see below), whose sum is σ = 3463200. Its totient is φ = 3443244.

The previous prime is 3453217. The next prime is 3453251. The reversal of 3453221 is 1223543.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 3453221 - 2² = 3453217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3453193 and 3453202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3453251) 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, 4451 + ... + 5168.

It is an arithmetic number, because the mean of its divisors is an integer number (865800).

Almost surely, 2^3453221 is an apocalyptic number.

It is an amenable number.

3453221 is a deficient number, since it is larger than the sum of its proper divisors (9979).

3453221 is an equidigital number, since it uses as much as digits as its factorization.

3453221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9978.

The product of its digits is 720, while the sum is 20.

The square root of 3453221 is about 1858.2844238706. The cubic root of 3453221 is about 151.1499905765.

Adding to 3453221 its reverse (1223543), we get a palindrome (4676764).

The spelling of 3453221 in words is "three million, four hundred fifty-three thousand, two hundred twenty-one".