2001299 has 4 divisors (see below), whose sum is σ = 2088336. Its totient is φ = 1914264.

The previous prime is 2001281. The next prime is 2001313. The reversal of 2001299 is 9921002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001299 - 2¹⁶ = 1935763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 87013 = 2001299 / (2 + 0 + 0 + 1 + 2 + 9 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001229) 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 3 ways as a sum of consecutive naturals, for example, 43484 + ... + 43529.

It is an arithmetic number, because the mean of its divisors is an integer number (522084).

2^2001299 is an apocalyptic number.

2001299 is a deficient number, since it is larger than the sum of its proper divisors (87037).

2001299 is an equidigital number, since it uses as much as digits as its factorization.

2001299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87036.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2001299 is about 1414.6727536784. The cubic root of 2001299 is about 126.0193763768.

The spelling of 2001299 in words is "two million, one thousand, two hundred ninety-nine".