3145220 has 24 divisors (see below), whose sum is σ = 7113624. Its totient is φ = 1161216.

The previous prime is 3145211. The next prime is 3145223. The reversal of 3145220 is 225413.

It can be written as a sum of positive squares in 4 ways, for example, as 103684 + 3041536 = 322^2 + 1744^2 .

It is not an unprimeable number, because it can be changed into a prime (3145223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5789 + ... + 6308.

It is an arithmetic number, because the mean of its divisors is an integer number (296401).

Almost surely, 2^3145220 is an apocalyptic number.

It is an amenable number.

3145220 is an abundant number, since it is smaller than the sum of its proper divisors (3968404).

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

3145220 is a wasteful number, since it uses less digits than its factorization.

3145220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12119 (or 12117 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 3145220 is about 1773.4768112383. The cubic root of 3145220 is about 146.5155353225.

The spelling of 3145220 in words is "three million, one hundred forty-five thousand, two hundred twenty".