1312143012 has 18 divisors (see below), whose sum is σ = 3316806038. Its totient is φ = 437380992.

The previous prime is 1312142989. The next prime is 1312143017. The reversal of 1312143012 is 2103412131.

It can be written as a sum of positive squares in only one way, i.e., 1167998976 + 144144036 = 34176^2 + 12006^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×1312143012³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1312143017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18224173 + ... + 18224244.

Almost surely, 2^1312143012 is an apocalyptic number.

1312143012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312143012 is an abundant number, since it is smaller than the sum of its proper divisors (2004663026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312143012 is a wasteful number, since it uses less digits than its factorization.

1312143012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36448427 (or 36448422 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1312143012 is about 36223.5146279320. The cubic root of 1312143012 is about 1094.7805102071.

Adding to 1312143012 its reverse (2103412131), we get a palindrome (3415555143).

The spelling of 1312143012 in words is "one billion, three hundred twelve million, one hundred forty-three thousand, twelve".