1312123 has 4 divisors (see below), whose sum is σ = 1344168. Its totient is φ = 1280080.

The previous prime is 1312093. The next prime is 1312133. The reversal of 1312123 is 3212131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3212131 = 13 ⋅247087.

It is a cyclic number.

It is not a de Polignac number, because 1312123 - 2¹³ = 1303931 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312133) 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, 15961 + ... + 16042.

It is an arithmetic number, because the mean of its divisors is an integer number (336042).

2^1312123 is an apocalyptic number.

1312123 is a deficient number, since it is larger than the sum of its proper divisors (32045).

1312123 is an equidigital number, since it uses as much as digits as its factorization.

1312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32044.

The product of its digits is 36, while the sum is 13.

The square root of 1312123 is about 1145.4793756328. The cubic root of 1312123 is about 109.4774944539.

Adding to 1312123 its reverse (3212131), we get a palindrome (4524254).

The spelling of 1312123 in words is "one million, three hundred twelve thousand, one hundred twenty-three".