2001266043 has 16 divisors (see below), whose sum is σ = 3067814400. Its totient is φ = 1136730816.

The previous prime is 2001266023. The next prime is 2001266083. The reversal of 2001266043 is 3406621002.

It is not a de Polignac number, because 2001266043 - 2⁵ = 2001266011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001266023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281818 + ... + 288831.

It is an arithmetic number, because the mean of its divisors is an integer number (191738400).

Almost surely, 2^2001266043 is an apocalyptic number.

2001266043 is a deficient number, since it is larger than the sum of its proper divisors (1066548357).

2001266043 is a wasteful number, since it uses less digits than its factorization.

2001266043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570826.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 2001266043 is about 44735.5121016849. The cubic root of 2001266043 is about 1260.1868461888.

Adding to 2001266043 its reverse (3406621002), we get a palindrome (5407887045).

The spelling of 2001266043 in words is "two billion, one million, two hundred sixty-six thousand, forty-three".