2001247 has 2 divisors, whose sum is σ = 2001248. Its totient is φ = 2001246.

The previous prime is 2001229. The next prime is 2001269. The reversal of 2001247 is 7421002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000623 + 1000624.

It is an arithmetic number, because the mean of its divisors is an integer number (1000624).

2^2001247 is an apocalyptic number.

2001247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001247 is an equidigital number, since it uses as much as digits as its factorization.

2001247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2001247 is about 1414.6543747502. The cubic root of 2001247 is about 126.0182849083.

Adding to 2001247 its reverse (7421002), we get a palindrome (9422249).

The spelling of 2001247 in words is "two million, one thousand, two hundred forty-seven".