1243312127 has 8 divisors (see below), whose sum is σ = 1306842336. Its totient is φ = 1180571392.

The previous prime is 1243312069. The next prime is 1243312163. The reversal of 1243312127 is 7212133421.

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 1243312127 - 2⁸ = 1243311871 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243312096 and 1243312105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243312927) 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, 194138 + ... + 200439.

It is an arithmetic number, because the mean of its divisors is an integer number (163355292).

Almost surely, 2^1243312127 is an apocalyptic number.

1243312127 is a deficient number, since it is larger than the sum of its proper divisors (63530209).

1243312127 is a wasteful number, since it uses less digits than its factorization.

1243312127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394737.

The product of its digits is 2016, while the sum is 26.

The square root of 1243312127 is about 35260.6314038759. The cubic root of 1243312127 is about 1075.2927638170.

Adding to 1243312127 its reverse (7212133421), we get a palindrome (8455445548).

The spelling of 1243312127 in words is "one billion, two hundred forty-three million, three hundred twelve thousand, one hundred twenty-seven".