4018001 has 8 divisors (see below), whose sum is σ = 4581864. Its totient is φ = 3490560.

The previous prime is 4017997. The next prime is 4018039. The reversal of 4018001 is 1008104.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1380625 + 2637376 = 1175^2 + 1624^2 .

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 4018001 - 2² = 4017997 is a prime.

It is a super-2 number, since 2×4018001² = 32288664072002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4018061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8870 + ... + 9311.

It is an arithmetic number, because the mean of its divisors is an integer number (572733).

Almost surely, 2^4018001 is an apocalyptic number.

It is an amenable number.

4018001 is a deficient number, since it is larger than the sum of its proper divisors (563863).

4018001 is a wasteful number, since it uses less digits than its factorization.

4018001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18211.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 4018001 is about 2004.4951982981. The cubic root of 4018001 is about 158.9778722684.

The spelling of 4018001 in words is "four million, eighteen thousand, one".