4220556 has 36 divisors (see below), whose sum is σ = 10469928. Its totient is φ = 1323008.

The previous prime is 4220551. The next prime is 4220563. The reversal of 4220556 is 6550224.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (4220551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2860 + ... + 4076.

Almost surely, 2^4220556 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 4220556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5234964).

4220556 is an abundant number, since it is smaller than the sum of its proper divisors (6249372).

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

4220556 is a wasteful number, since it uses less digits than its factorization.

4220556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 4220556 is about 2054.3991822428. The cubic root of 4220556 is about 161.6056557018.

The spelling of 4220556 in words is "four million, two hundred twenty thousand, five hundred fifty-six".