1268127823 has 4 divisors (see below), whose sum is σ = 1268209440. Its totient is φ = 1268046208.

The previous prime is 1268127797. The next prime is 1268127857. The reversal of 1268127823 is 3287218621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3287218621 = 109 ⋅30157969.

It is a cyclic number.

It is not a de Polignac number, because 1268127823 - 2²¹ = 1266030671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268121823) 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, 9490 + ... + 51247.

It is an arithmetic number, because the mean of its divisors is an integer number (317052360).

Almost surely, 2^1268127823 is an apocalyptic number.

1268127823 is a deficient number, since it is larger than the sum of its proper divisors (81617).

1268127823 is an equidigital number, since it uses as much as digits as its factorization.

1268127823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81616.

The product of its digits is 64512, while the sum is 40.

The square root of 1268127823 is about 35610.7823980322. The cubic root of 1268127823 is about 1082.3997344849.

It can be divided in two parts, 12681 and 27823, that added together give a palindrome (40504).

The spelling of 1268127823 in words is "one billion, two hundred sixty-eight million, one hundred twenty-seven thousand, eight hundred twenty-three".