1243043 has 4 divisors (see below), whose sum is σ = 1247400. Its totient is φ = 1238688.

The previous prime is 1243013. The next prime is 1243093. The reversal of 1243043 is 3403421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3403421 = 7 ⋅486203.

It is a cyclic number.

It is not a de Polignac number, because 1243043 - 2⁶ = 1242979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243003) 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 in 3 ways as a sum of consecutive naturals, for example, 1718 + ... + 2331.

It is an arithmetic number, because the mean of its divisors is an integer number (311850).

2^1243043 is an apocalyptic number.

1243043 is a deficient number, since it is larger than the sum of its proper divisors (4357).

1243043 is an equidigital number, since it uses as much as digits as its factorization.

1243043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1243043 is about 1114.9183826631. The cubic root of 1243043 is about 107.5215172360.

Adding to 1243043 its reverse (3403421), we get a palindrome (4646464).

The spelling of 1243043 in words is "one million, two hundred forty-three thousand, forty-three".