1312268123 has 4 divisors (see below), whose sum is σ = 1316542920. Its totient is φ = 1307993328.

The previous prime is 1312268119. The next prime is 1312268201. The reversal of 1312268123 is 3218622131.

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 1312268123 - 2² = 1312268119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312268323) 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, 2136938 + ... + 2137551.

It is an arithmetic number, because the mean of its divisors is an integer number (329135730).

Almost surely, 2^1312268123 is an apocalyptic number.

1312268123 is a deficient number, since it is larger than the sum of its proper divisors (4274797).

1312268123 is an equidigital number, since it uses as much as digits as its factorization.

1312268123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274796.

The product of its digits is 3456, while the sum is 29.

The square root of 1312268123 is about 36225.2415174834. The cubic root of 1312268123 is about 1094.8153043645.

The spelling of 1312268123 in words is "one billion, three hundred twelve million, two hundred sixty-eight thousand, one hundred twenty-three".