1312143100 has 36 divisors (see below), whose sum is σ = 2971153584. Its totient is φ = 502036480.

The previous prime is 1312143089. The next prime is 1312143103. The reversal of 1312143100 is 13412131.

It is a super-2 number, since 2×1312143100² = 3443439029755220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312143103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282949 + ... + 287548.

It is an arithmetic number, because the mean of its divisors is an integer number (82532044).

Almost surely, 2^1312143100 is an apocalyptic number.

1312143100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312143100 is an abundant number, since it is smaller than the sum of its proper divisors (1659010484).

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

1312143100 is a wasteful number, since it uses less digits than its factorization.

1312143100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570534 (or 570527 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1312143100 is about 36223.5158426125. The cubic root of 1312143100 is about 1094.7805346812.

Adding to 1312143100 its reverse (13412131), we get a palindrome (1325555231).

The spelling of 1312143100 in words is "one billion, three hundred twelve million, one hundred forty-three thousand, one hundred".