4551220 has 12 divisors (see below), whose sum is σ = 9557604. Its totient is φ = 1820480.

The previous prime is 4551199. The next prime is 4551227. The reversal of 4551220 is 221554.

It can be written as a sum of positive squares in 2 ways, for example, as 3283344 + 1267876 = 1812^2 + 1126^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4551227) 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, 113761 + ... + 113800.

It is an arithmetic number, because the mean of its divisors is an integer number (796467).

Almost surely, 2^4551220 is an apocalyptic number.

It is an amenable number.

4551220 is an abundant number, since it is smaller than the sum of its proper divisors (5006384).

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

4551220 is a wasteful number, since it uses less digits than its factorization.

4551220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227570 (or 227568 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4551220 is about 2133.3588540140. The cubic root of 4551220 is about 165.7203886264.

Adding to 4551220 its reverse (221554), we get a palindrome (4772774).

The spelling of 4551220 in words is "four million, five hundred fifty-one thousand, two hundred twenty".