4022001 has 16 divisors (see below), whose sum is σ = 5998720. Its totient is φ = 2663280.

The previous prime is 4021973. The next prime is 4022003. The reversal of 4022001 is 1002204.

It is not a de Polignac number, because 4022001 - 2⁷ = 4021873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4022003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4476 + ... + 5298.

It is an arithmetic number, because the mean of its divisors is an integer number (374920).

Almost surely, 2^4022001 is an apocalyptic number.

It is an amenable number.

4022001 is a deficient number, since it is larger than the sum of its proper divisors (1976719).

4022001 is a wasteful number, since it uses less digits than its factorization.

4022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1007 counting only the distinct ones).

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

The square root of 4022001 is about 2005.4927075410. The cubic root of 4022001 is about 159.0306099843.

Adding to 4022001 its reverse (1002204), we get a palindrome (5024205).

The spelling of 4022001 in words is "four million, twenty-two thousand, one".