4151220 has 48 divisors (see below), whose sum is σ = 11901120. Its totient is φ = 1080576.

The previous prime is 4151219. The next prime is 4151239. The reversal of 4151220 is 221514.

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 4151220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1776 + ... + 3384.

It is an arithmetic number, because the mean of its divisors is an integer number (247940).

Almost surely, 2^4151220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4151220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5950560).

4151220 is an abundant number, since it is smaller than the sum of its proper divisors (7749900).

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

4151220 is a wasteful number, since it uses less digits than its factorization.

4151220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 4151220 is about 2037.4542939659. The cubic root of 4151220 is about 160.7158033014.

Adding to 4151220 its reverse (221514), we get a palindrome (4372734).

It can be divided in two parts, 4151 and 220, that added together give a triangular number (4371 = T₉₃).

The spelling of 4151220 in words is "four million, one hundred fifty-one thousand, two hundred twenty".