4145220 has 36 divisors (see below), whose sum is σ = 12574380. Its totient is φ = 1105344.

The previous prime is 4145213. The next prime is 4145257. The reversal of 4145220 is 225414.

It can be written as a sum of positive squares in 2 ways, for example, as 2762244 + 1382976 = 1662^2 + 1176^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4145193 and 4145202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11335 + ... + 11694.

Almost surely, 2^4145220 is an apocalyptic number.

It is an amenable number.

4145220 is an abundant number, since it is smaller than the sum of its proper divisors (8429160).

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

4145220 is a wasteful number, since it uses less digits than its factorization.

4145220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23044 (or 23039 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 4145220 is about 2035.9813358673. The cubic root of 4145220 is about 160.6383353299.

The spelling of 4145220 in words is "four million, one hundred forty-five thousand, two hundred twenty".