4220649 has 12 divisors (see below), whose sum is σ = 6122116. Its totient is φ = 2801952.

The previous prime is 4220639. The next prime is 4220653. The reversal of 4220649 is 9460224.

It can be written as a sum of positive squares in 2 ways, for example, as 1140624 + 3080025 = 1068^2 + 1755^2 .

It is not a de Polignac number, because 4220649 - 2⁵ = 4220617 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 2⁷ + 2¹¹ + 0 + 6⁵ + 4¹¹ + 9 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4220609) 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, 1647 + ... + 3339.

Almost surely, 2^4220649 is an apocalyptic number.

It is an amenable number.

4220649 is a deficient number, since it is larger than the sum of its proper divisors (1901467).

4220649 is a wasteful number, since it uses less digits than its factorization.

4220649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976 (or 1973 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 4220649 is about 2054.4218164729. The cubic root of 4220649 is about 161.6068426872.

The spelling of 4220649 in words is "four million, two hundred twenty thousand, six hundred forty-nine".