1243943 has 2 divisors, whose sum is σ = 1243944. Its totient is φ = 1243942.

The previous prime is 1243939. The next prime is 1243951. The reversal of 1243943 is 3493421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1243943 - 2² = 1243939 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243933) 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, 621971 + 621972.

It is an arithmetic number, because the mean of its divisors is an integer number (621972).

2^1243943 is an apocalyptic number.

1243943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243943 is an equidigital number, since it uses as much as digits as its factorization.

1243943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 1243943 is about 1115.3219266203. The cubic root of 1243943 is about 107.5474605649.

The spelling of 1243943 in words is "one million, two hundred forty-three thousand, nine hundred forty-three".