3446821 has 4 divisors (see below), whose sum is σ = 3939232. Its totient is φ = 2954412.

The previous prime is 3446819. The next prime is 3446843. The reversal of 3446821 is 1286443.

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: 1286443 = 433 ⋅2971.

It is a cyclic number.

It is not a de Polignac number, because 3446821 - 2¹ = 3446819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3446821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3441821) 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, 246195 + ... + 246208.

It is an arithmetic number, because the mean of its divisors is an integer number (984808).

Almost surely, 2^3446821 is an apocalyptic number.

It is an amenable number.

3446821 is a deficient number, since it is larger than the sum of its proper divisors (492411).

3446821 is an equidigital number, since it uses as much as digits as its factorization.

3446821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492410.

The product of its digits is 4608, while the sum is 28.

The square root of 3446821 is about 1856.5616068421. The cubic root of 3446821 is about 151.0565552812.

The spelling of 3446821 in words is "three million, four hundred forty-six thousand, eight hundred twenty-one".