1312123859 has 8 divisors (see below), whose sum is σ = 1350001680. Its totient is φ = 1274373216.

The previous prime is 1312123853. The next prime is 1312123909. The reversal of 1312123859 is 9583212131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312123859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312123853) 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, 10664 + ... + 52325.

It is an arithmetic number, because the mean of its divisors is an integer number (168750210).

Almost surely, 2^1312123859 is an apocalyptic number.

1312123859 is a deficient number, since it is larger than the sum of its proper divisors (37877821).

1312123859 is an equidigital number, since it uses as much as digits as its factorization.

1312123859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63589.

The product of its digits is 12960, while the sum is 35.

The square root of 1312123859 is about 36223.2502544981. The cubic root of 1312123859 is about 1094.7751834419.

The spelling of 1312123859 in words is "one billion, three hundred twelve million, one hundred twenty-three thousand, eight hundred fifty-nine".