4220420 has 24 divisors (see below), whose sum is σ = 9384984. Its totient is φ = 1588736.

The previous prime is 4220393. The next prime is 4220423. The reversal of 4220420 is 240224.

It is a happy number.

4220420 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 4 ways, for example, as 541696 + 3678724 = 736^2 + 1918^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4220395 and 4220404.

It is not an unprimeable number, because it can be changed into a prime (4220423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5867 + ... + 6546.

It is an arithmetic number, because the mean of its divisors is an integer number (391041).

Almost surely, 2^4220420 is an apocalyptic number.

It is an amenable number.

4220420 is an abundant number, since it is smaller than the sum of its proper divisors (5164564).

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

4220420 is a wasteful number, since it uses less digits than its factorization.

4220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12439 (or 12437 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 4220420 is about 2054.3660822745. The cubic root of 4220420 is about 161.6039198637.

Adding to 4220420 its reverse (240224), we get a palindrome (4460644).

It can be divided in two parts, 42204 and 20, that added together give a palindrome (42224).

The spelling of 4220420 in words is "four million, two hundred twenty thousand, four hundred twenty".