2001129 has 12 divisors (see below), whose sum is σ = 2889936. Its totient is φ = 1231152.

The previous prime is 2001127. The next prime is 2001163. The reversal of 2001129 is 9211002.

It is a happy number.

It is not a de Polignac number, because 2001129 - 2¹ = 2001127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001127) 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 11 ways as a sum of consecutive naturals, for example, 1467 + ... + 2480.

It is an arithmetic number, because the mean of its divisors is an integer number (240828).

2^2001129 is an apocalyptic number.

It is an amenable number.

2001129 is a deficient number, since it is larger than the sum of its proper divisors (888807).

2001129 is a wasteful number, since it uses less digits than its factorization.

2001129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976 (or 3963 counting only the distinct ones).

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

The square root of 2001129 is about 1414.6126678353. The cubic root of 2001129 is about 126.0158080443.

The spelling of 2001129 in words is "two million, one thousand, one hundred twenty-nine".