4220001 has 6 divisors (see below), whose sum is σ = 6095570. Its totient is φ = 2813328.

The previous prime is 4219991. The next prime is 4220039. The reversal of 4220001 is 1000224.

It can be written as a sum of positive squares in only one way, i.e., 3326976 + 893025 = 1824^2 + 945^2 .

It is not a de Polignac number, because 4220001 - 2¹⁵ = 4187233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 468889 = 4220001 / (4 + 2 + 2 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4220081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 234436 + ... + 234453.

Almost surely, 2^4220001 is an apocalyptic number.

It is an amenable number.

4220001 is a deficient number, since it is larger than the sum of its proper divisors (1875569).

4220001 is a wasteful number, since it uses less digits than its factorization.

4220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468895 (or 468892 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 4220001 is about 2054.2641018136. The cubic root of 4220001 is about 161.5985717165.

Adding to 4220001 its reverse (1000224), we get a palindrome (5220225).

The spelling of 4220001 in words is "four million, two hundred twenty thousand, one".