2001447 has 12 divisors (see below), whose sum is σ = 3304080. Its totient is φ = 1143648.

The previous prime is 2001421. The next prime is 2001449. The reversal of 2001447 is 7441002.

It is a happy number.

It is not a de Polignac number, because 2001447 - 2⁸ = 2001191 is a prime.

It is an Ulam number.

2001447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001449) 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, 15822 + ... + 15947.

It is an arithmetic number, because the mean of its divisors is an integer number (275340).

2^2001447 is an apocalyptic number.

2001447 is a deficient number, since it is larger than the sum of its proper divisors (1302633).

2001447 is a wasteful number, since it uses less digits than its factorization.

2001447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31782 (or 31779 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2001447 is about 1414.7250616286. The cubic root of 2001447 is about 126.0224827605.

Adding to 2001447 its reverse (7441002), we get a palindrome (9442449).

The spelling of 2001447 in words is "two million, one thousand, four hundred forty-seven".