121843 has 2 divisors, whose sum is σ = 121844. Its totient is φ = 121842.

The previous prime is 121789. The next prime is 121853. The reversal of 121843 is 348121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121843 is a prime.

121843 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 121843.

It is not a weakly prime, because it can be changed into another prime (121853) 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, 60921 + 60922.

It is an arithmetic number, because the mean of its divisors is an integer number (60922).

2¹²¹⁸⁴³ is an apocalyptic number.

121843 is a deficient number, since it is larger than the sum of its proper divisors (1).

121843 is an equidigital number, since it uses as much as digits as its factorization.

121843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 19.

The square root of 121843 is about 349.0601667335. The cubic root of 121843 is about 49.5754723942.

Adding to 121843 its reverse (348121), we get a palindrome (469964).

The spelling of 121843 in words is "one hundred twenty-one thousand, eight hundred forty-three".