1312166105 has 4 divisors (see below), whose sum is σ = 1574599332. Its totient is φ = 1049732880.

The previous prime is 1312166083. The next prime is 1312166117. The reversal of 1312166105 is 5016612131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 934096969 + 378069136 = 30563^2 + 19444^2 .

It is not a de Polignac number, because 1312166105 - 2⁸ = 1312165849 is a prime.

It is a super-2 number, since 2×1312166105² = 3443559774221742050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131216606 + ... + 131216615.

It is an arithmetic number, because the mean of its divisors is an integer number (393649833).

Almost surely, 2^1312166105 is an apocalyptic number.

It is an amenable number.

1312166105 is a deficient number, since it is larger than the sum of its proper divisors (262433227).

1312166105 is an equidigital number, since it uses as much as digits as its factorization.

1312166105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262433226.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1312166105 is about 36223.8333835612. The cubic root of 1312166105 is about 1094.7869326823.

Adding to 1312166105 its reverse (5016612131), we get a palindrome (6328778236).

The spelling of 1312166105 in words is "one billion, three hundred twelve million, one hundred sixty-six thousand, one hundred five".