3125220 has 72 divisors (see below), whose sum is σ = 10188864. Its totient is φ = 713664.

The previous prime is 3125219. The next prime is 3125257. The reversal of 3125220 is 225213.

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 3125220.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2409 + ... + 3471.

It is an arithmetic number, because the mean of its divisors is an integer number (141512).

Almost surely, 2^3125220 is an apocalyptic number.

3125220 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 3125220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5094432).

3125220 is an abundant number, since it is smaller than the sum of its proper divisors (7063644).

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

3125220 is a wasteful number, since it uses less digits than its factorization.

3125220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 3125220 is about 1767.8291772680. The cubic root of 3125220 is about 146.2043176776.

The spelling of 3125220 in words is "three million, one hundred twenty-five thousand, two hundred twenty".