3443721 has 16 divisors (see below), whose sum is σ = 4959360. Its totient is φ = 2119040.

The previous prime is 3443719. The next prime is 3443723. The reversal of 3443721 is 1273443.

It is an interprime number because it is at equal distance from previous prime (3443719) and next prime (3443723).

It is a cyclic number.

It is not a de Polignac number, because 3443721 - 2¹ = 3443719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3443691 and 3443700.

It is not an unprimeable number, because it can be changed into a prime (3443723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (309960).

Almost surely, 2^3443721 is an apocalyptic number.

It is an amenable number.

3443721 is a deficient number, since it is larger than the sum of its proper divisors (1515639).

3443721 is a wasteful number, since it uses less digits than its factorization.

3443721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776.

The product of its digits is 2016, while the sum is 24.

The square root of 3443721 is about 1855.7265423548. The cubic root of 3443721 is about 151.0112559771.

The spelling of 3443721 in words is "three million, four hundred forty-three thousand, seven hundred twenty-one".