4011001 has 4 divisors (see below), whose sum is σ = 4023972. Its totient is φ = 3998032.

The previous prime is 4010977. The next prime is 4011011. The reversal of 4011001 is 1001104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90601 + 3920400 = 301^2 + 1980^2 .

It is a cyclic number.

It is not a de Polignac number, because 4011001 - 2¹⁹ = 3486713 is a prime.

It is an Ulam number.

It is a Duffinian number.

4011001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4011011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6010 + ... + 6643.

It is an arithmetic number, because the mean of its divisors is an integer number (1005993).

Almost surely, 2^4011001 is an apocalyptic number.

It is an amenable number.

4011001 is a deficient number, since it is larger than the sum of its proper divisors (12971).

4011001 is a wasteful number, since it uses less digits than its factorization.

4011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12970.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 4011001 is about 2002.7483616271. The cubic root of 4011001 is about 158.8854969817.

Adding to 4011001 its reverse (1001104), we get a palindrome (5012105).

The spelling of 4011001 in words is "four million, eleven thousand, one".