1312799000 has 64 divisors (see below), whose sum is σ = 3096437760. Its totient is φ = 520934400.

The previous prime is 1312798979. The next prime is 1312799009. The reversal of 1312799000 is 9972131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312799009) 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 15 ways as a sum of consecutive naturals, for example, 121832 + ... + 132168.

It is an arithmetic number, because the mean of its divisors is an integer number (48381840).

Almost surely, 2^1312799000 is an apocalyptic number.

1312799000 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 1312799000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548218880).

1312799000 is an abundant number, since it is smaller than the sum of its proper divisors (1783638760).

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

1312799000 is a wasteful number, since it uses less digits than its factorization.

1312799000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10485 (or 10471 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 1312799000 is about 36232.5682225260. The cubic root of 1312799000 is about 1094.9629200068.

The spelling of 1312799000 in words is "one billion, three hundred twelve million, seven hundred ninety-nine thousand".