1312143000 has 128 divisors (see below), whose sum is σ = 4678801920. Its totient is φ = 299913600.

The previous prime is 1312142989. The next prime is 1312143017. The reversal of 1312143000 is 3412131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10242 + ... + 52241.

It is an arithmetic number, because the mean of its divisors is an integer number (36553140).

Almost surely, 2^1312143000 is an apocalyptic number.

1312143000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312143000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339400960).

1312143000 is an abundant number, since it is smaller than the sum of its proper divisors (3366658920).

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

1312143000 is a wasteful number, since it uses less digits than its factorization.

1312143000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62514 (or 62500 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1312143000 is about 36223.5144622937. The cubic root of 1312143000 is about 1094.7805068697.

Adding to 1312143000 its reverse (3412131), we get a palindrome (1315555131).

The spelling of 1312143000 in words is "one billion, three hundred twelve million, one hundred forty-three thousand".