1243117 has 4 divisors (see below), whose sum is σ = 1260220. Its totient is φ = 1226016.

The previous prime is 1243111. The next prime is 1243129. The reversal of 1243117 is 7113421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7113421 = 7 ⋅1016203.

It can be written as a sum of positive squares in 2 ways, for example, as 857476 + 385641 = 926^2 + 621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243094 and 1243103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243111) 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, 8442 + ... + 8587.

It is an arithmetic number, because the mean of its divisors is an integer number (315055).

2^1243117 is an apocalyptic number.

It is an amenable number.

1243117 is a deficient number, since it is larger than the sum of its proper divisors (17103).

1243117 is an equidigital number, since it uses as much as digits as its factorization.

1243117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17102.

The product of its digits is 168, while the sum is 19.

The square root of 1243117 is about 1114.9515684549. The cubic root of 1243117 is about 107.5236508265.

Adding to 1243117 its reverse (7113421), we get a palindrome (8356538).

The spelling of 1243117 in words is "one million, two hundred forty-three thousand, one hundred seventeen".