2001047 has 4 divisors (see below), whose sum is σ = 2025240. Its totient is φ = 1976856.

The previous prime is 2001037. The next prime is 2001049. The reversal of 2001047 is 7401002.

It is a happy number.

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 2001047 - 2¹⁸ = 1738903 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001049) 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, 11972 + ... + 12137.

It is an arithmetic number, because the mean of its divisors is an integer number (506310).

2^2001047 is an apocalyptic number.

2001047 is a deficient number, since it is larger than the sum of its proper divisors (24193).

2001047 is an equidigital number, since it uses as much as digits as its factorization.

2001047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24192.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 2001047 is about 1414.5836843397. The cubic root of 2001047 is about 126.0140867764.

Adding to 2001047 its reverse (7401002), we get a palindrome (9402049).

The spelling of 2001047 in words is "two million, one thousand, forty-seven".