1243123117 has 8 divisors (see below), whose sum is σ = 1260435456. Its totient is φ = 1225928592.

The previous prime is 1243123103. The next prime is 1243123187. The reversal of 1243123117 is 7113213421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243123117 - 2¹⁹ = 1242598829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243123091 and 1243123100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243123187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8098 + ... + 50515.

It is an arithmetic number, because the mean of its divisors is an integer number (157554432).

Almost surely, 2^1243123117 is an apocalyptic number.

It is an amenable number.

1243123117 is a deficient number, since it is larger than the sum of its proper divisors (17312339).

1243123117 is a wasteful number, since it uses less digits than its factorization.

1243123117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58907.

The product of its digits is 1008, while the sum is 25.

The square root of 1243123117 is about 35257.9511174430. The cubic root of 1243123117 is about 1075.2382718996.

Adding to 1243123117 its reverse (7113213421), we get a palindrome (8356336538).

The spelling of 1243123117 in words is "one billion, two hundred forty-three million, one hundred twenty-three thousand, one hundred seventeen".