1231843 has 2 divisors, whose sum is σ = 1231844. Its totient is φ = 1231842.

The previous prime is 1231831. The next prime is 1231859. The reversal of 1231843 is 3481321.

It is a weak prime.

It is an emirp because it is prime and its reverse (3481321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615921 + 615922.

It is an arithmetic number, because the mean of its divisors is an integer number (615922).

2^1231843 is an apocalyptic number.

1231843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231843 is an equidigital number, since it uses as much as digits as its factorization.

1231843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 1231843 is about 1109.8842281968. The cubic root of 1231843 is about 107.1976142541.

The spelling of 1231843 in words is "one million, two hundred thirty-one thousand, eight hundred forty-three".