3449921 has 4 divisors (see below), whose sum is σ = 3454512. Its totient is φ = 3445332.

The previous prime is 3449909. The next prime is 3449939. The reversal of 3449921 is 1299443.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1299443 = 239 ⋅5437.

It is a cyclic number.

It is not a de Polignac number, because 3449921 - 2¹⁰ = 3448897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3449951) 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, 875 + ... + 2768.

It is an arithmetic number, because the mean of its divisors is an integer number (863628).

Almost surely, 2^3449921 is an apocalyptic number.

It is an amenable number.

3449921 is a deficient number, since it is larger than the sum of its proper divisors (4591).

3449921 is an equidigital number, since it uses as much as digits as its factorization.

3449921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4590.

The product of its digits is 7776, while the sum is 32.

The square root of 3449921 is about 1857.3962958938. The cubic root of 3449921 is about 151.1018274325.

The spelling of 3449921 in words is "three million, four hundred forty-nine thousand, nine hundred twenty-one".