2001429 has 10 divisors (see below), whose sum is σ = 2989910. Its totient is φ = 1334232.

The previous prime is 2001421. The next prime is 2001449. The reversal of 2001429 is 9241002.

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 178929 = 1350^2 + 423^2 .

It is not a de Polignac number, because 2001429 - 2³ = 2001421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001421) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12274 + ... + 12435.

It is an arithmetic number, because the mean of its divisors is an integer number (298991).

2^2001429 is an apocalyptic number.

It is an amenable number.

2001429 is a deficient number, since it is larger than the sum of its proper divisors (988481).

2001429 is an equidigital number, since it uses as much as digits as its factorization.

2001429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24721 (or 24712 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2001429 is about 1414.7186999542. The cubic root of 2001429 is about 126.0221049653.

The spelling of 2001429 in words is "two million, one thousand, four hundred twenty-nine".