3421720 has 32 divisors (see below), whose sum is σ = 7769520. Its totient is φ = 1356160.

The previous prime is 3421711. The next prime is 3421751. The reversal of 3421720 is 271243.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4914 + ... + 5566.

Almost surely, 2^3421720 is an apocalyptic number.

It is an amenable number.

3421720 is an abundant number, since it is smaller than the sum of its proper divisors (4347800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3421720 is a wasteful number, since it uses less digits than its factorization.

3421720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 3421720 is about 1849.7891771767. The cubic root of 3421720 is about 150.6889786920.

Adding to 3421720 its reverse (271243), we get a palindrome (3692963).

The spelling of 3421720 in words is "three million, four hundred twenty-one thousand, seven hundred twenty".