2001291 has 8 divisors (see below), whose sum is σ = 2825424. Its totient is φ = 1255680.

The previous prime is 2001281. The next prime is 2001313. The reversal of 2001291 is 1921002.

It is a happy number.

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

It is not a de Polignac number, because 2001291 - 2⁷ = 2001163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001291.

It is not an unprimeable number, because it can be changed into a prime (2001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19570 + ... + 19671.

It is an arithmetic number, because the mean of its divisors is an integer number (353178).

2^2001291 is an apocalyptic number.

2001291 is a deficient number, since it is larger than the sum of its proper divisors (824133).

2001291 is a wasteful number, since it uses less digits than its factorization.

2001291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39261.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2001291 is about 1414.6699261665. The cubic root of 2001291 is about 126.0192084598.

Adding to 2001291 its reverse (1921002), we get a palindrome (3922293).

The spelling of 2001291 in words is "two million, one thousand, two hundred ninety-one".