1312618145 has 8 divisors (see below), whose sum is σ = 1579606056. Its totient is φ = 1047118336.

The previous prime is 1312618141. The next prime is 1312618169. The reversal of 1312618145 is 5418162131.

It can be written as a sum of positive squares in 4 ways, for example, as 107972881 + 1204645264 = 10391^2 + 34708^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1312618145 - 2² = 1312618141 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312618141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370082 + ... + 373611.

It is an arithmetic number, because the mean of its divisors is an integer number (197450757).

Almost surely, 2^1312618145 is an apocalyptic number.

It is an amenable number.

1312618145 is a deficient number, since it is larger than the sum of its proper divisors (266987911).

1312618145 is an equidigital number, since it uses as much as digits as its factorization.

1312618145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744051.

The product of its digits is 5760, while the sum is 32.

The square root of 1312618145 is about 36230.0723846917. The cubic root of 1312618145 is about 1094.9126359411.

The spelling of 1312618145 in words is "one billion, three hundred twelve million, six hundred eighteen thousand, one hundred forty-five".