1312023000 has 128 divisors (see below), whose sum is σ = 4113270720. Its totient is φ = 348185600.

The previous prime is 1312022989. The next prime is 1312023007. The reversal of 1312023000 is 3202131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312023007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 698062 + ... + 699938.

Almost surely, 2^1312023000 is an apocalyptic number.

1312023000 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 1312023000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2056635360).

1312023000 is an abundant number, since it is smaller than the sum of its proper divisors (2801247720).

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

1312023000 is a wasteful number, since it uses less digits than its factorization.

1312023000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134 (or 2120 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1312023000 is about 36221.8580417957. The cubic root of 1312023000 is about 1094.7471320353.

Adding to 1312023000 its reverse (3202131), we get a palindrome (1315225131).

The spelling of 1312023000 in words is "one billion, three hundred twelve million, twenty-three thousand".