1312243018 has 16 divisors (see below), whose sum is σ = 2073121920. Its totient is φ = 621241056.

The previous prime is 1312242991. The next prime is 1312243019. The reversal of 1312243018 is 8103422131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1312242983 and 1312243001.

It is not an unprimeable number, because it can be changed into a prime (1312243019) 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, 67071 + ... + 84397.

It is an arithmetic number, because the mean of its divisors is an integer number (129570120).

Almost surely, 2^1312243018 is an apocalyptic number.

1312243018 is a deficient number, since it is larger than the sum of its proper divisors (760878902).

1312243018 is a wasteful number, since it uses less digits than its factorization.

1312243018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19341.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1312243018 is about 36224.8950032985. The cubic root of 1312243018 is about 1094.8083226832.

Adding to 1312243018 its reverse (8103422131), we get a palindrome (9415665149).

The spelling of 1312243018 in words is "one billion, three hundred twelve million, two hundred forty-three thousand, eighteen".