3213420 has 72 divisors (see below), whose sum is σ = 10476144. Its totient is φ = 733824.

The previous prime is 3213401. The next prime is 3213421. The reversal of 3213420 is 243123.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 3213420.

It is not an unprimeable number, because it can be changed into a prime (3213421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2394 + ... + 3486.

It is an arithmetic number, because the mean of its divisors is an integer number (145502).

Almost surely, 2^3213420 is an apocalyptic number.

3213420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3213420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5238072).

3213420 is an abundant number, since it is smaller than the sum of its proper divisors (7262724).

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

3213420 is a wasteful number, since it uses less digits than its factorization.

3213420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 3213420 is about 1792.6014615636. The cubic root of 3213420 is about 147.5669714069.

Adding to 3213420 its reverse (243123), we get a palindrome (3456543).

It can be divided in two parts, 321 and 3420, that added together give a triangular number (3741 = T₈₆).

The spelling of 3213420 in words is "three million, two hundred thirteen thousand, four hundred twenty".