1312304123 has 16 divisors (see below), whose sum is σ = 1514565696. Its totient is φ = 1127364480.

The previous prime is 1312304113. The next prime is 1312304207. The reversal of 1312304123 is 3214032131.

It is a cyclic number.

It is not a de Polignac number, because 1312304123 - 2¹² = 1312300027 is a prime.

It is a super-2 number, since 2×1312304123² = 3444284222485598258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312304095 and 1312304104.

It is not an unprimeable number, because it can be changed into a prime (1312304113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48248 + ... + 70373.

It is an arithmetic number, because the mean of its divisors is an integer number (94660356).

Almost surely, 2^1312304123 is an apocalyptic number.

1312304123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1312304123 is a deficient number, since it is larger than the sum of its proper divisors (202261573).

1312304123 is a wasteful number, since it uses less digits than its factorization.

1312304123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118694.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1312304123 is about 36225.7384051726. The cubic root of 1312304123 is about 1094.8253157816.

Adding to 1312304123 its reverse (3214032131), we get a palindrome (4526336254).

The spelling of 1312304123 in words is "one billion, three hundred twelve million, three hundred four thousand, one hundred twenty-three".