4020001 has 8 divisors (see below), whose sum is σ = 4259520. Its totient is φ = 3783312.

The previous prime is 4019993. The next prime is 4020011. The reversal of 4020001 is 1000204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4020001 - 2³ = 4019993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4020011) 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, 2676 + ... + 3898.

It is an arithmetic number, because the mean of its divisors is an integer number (532440).

Almost surely, 2^4020001 is an apocalyptic number.

It is an amenable number.

4020001 is a deficient number, since it is larger than the sum of its proper divisors (239519).

4020001 is a wasteful number, since it uses less digits than its factorization.

4020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 4020001 is about 2004.9940149537. The cubic root of 4020001 is about 159.0042454993.

Adding to 4020001 its reverse (1000204), we get a palindrome (5020205).

The spelling of 4020001 in words is "four million, twenty thousand, one".