3261220 has 12 divisors (see below), whose sum is σ = 6848604. Its totient is φ = 1304480.

The previous prime is 3261211. The next prime is 3261221. The reversal of 3261220 is 221623.

It can be written as a sum of positive squares in 2 ways, for example, as 357604 + 2903616 = 598^2 + 1704^2 .

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 3261194 and 3261203.

It is not an unprimeable number, because it can be changed into a prime (3261221) 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, 81511 + ... + 81550.

It is an arithmetic number, because the mean of its divisors is an integer number (570717).

Almost surely, 2^3261220 is an apocalyptic number.

It is an amenable number.

3261220 is an abundant number, since it is smaller than the sum of its proper divisors (3587384).

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

3261220 is a wasteful number, since it uses less digits than its factorization.

3261220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163070 (or 163068 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3261220 is about 1805.8848246774. The cubic root of 3261220 is about 148.2950651046.

Adding to 3261220 its reverse (221623), we get a palindrome (3482843).

It can be divided in two parts, 3261 and 220, that added together give a square (3481 = 59²).

The spelling of 3261220 in words is "three million, two hundred sixty-one thousand, two hundred twenty".