1243123 has 4 divisors (see below), whose sum is σ = 1420720. Its totient is φ = 1065528.

The previous prime is 1243111. The next prime is 1243129. The reversal of 1243123 is 3213421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1243123 - 2⁹ = 1242611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243097 and 1243106.

It is not an unprimeable number, because it can be changed into a prime (1243129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88788 + ... + 88801.

It is an arithmetic number, because the mean of its divisors is an integer number (355180).

2^1243123 is an apocalyptic number.

1243123 is a deficient number, since it is larger than the sum of its proper divisors (177597).

1243123 is an equidigital number, since it uses as much as digits as its factorization.

1243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177596.

The product of its digits is 144, while the sum is 16.

The square root of 1243123 is about 1114.9542591515. The cubic root of 1243123 is about 107.5238238167.

Adding to 1243123 its reverse (3213421), we get a palindrome (4456544).

The spelling of 1243123 in words is "one million, two hundred forty-three thousand, one hundred twenty-three".