1217143 has 2 divisors, whose sum is σ = 1217144. Its totient is φ = 1217142.

The previous prime is 1217141. The next prime is 1217147. The reversal of 1217143 is 3417121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3417121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1217143 - 2¹ = 1217141 is a prime.

Together with 1217141, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1217143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217141) 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 as a sum of consecutive naturals, namely, 608571 + 608572.

It is an arithmetic number, because the mean of its divisors is an integer number (608572).

2^1217143 is an apocalyptic number.

1217143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217143 is an equidigital number, since it uses as much as digits as its factorization.

1217143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 19.

The square root of 1217143 is about 1103.2420405333. The cubic root of 1217143 is about 106.7694982729.

The spelling of 1217143 in words is "one million, two hundred seventeen thousand, one hundred forty-three".