1312001320 has 32 divisors (see below), whose sum is σ = 3373718400. Its totient is φ = 449828928.

The previous prime is 1312001309. The next prime is 1312001321. The reversal of 1312001320 is 231002131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312001320.

It is not an unprimeable number, because it can be changed into a prime (1312001321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2342580 + ... + 2343139.

It is an arithmetic number, because the mean of its divisors is an integer number (105428700).

Almost surely, 2^1312001320 is an apocalyptic number.

1312001320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312001320 is an abundant number, since it is smaller than the sum of its proper divisors (2061717080).

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

1312001320 is a wasteful number, since it uses less digits than its factorization.

1312001320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685737 (or 4685733 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1312001320 is about 36221.5587737469. The cubic root of 1312001320 is about 1094.7411020982.

Adding to 1312001320 its reverse (231002131), we get a palindrome (1543003451).

The spelling of 1312001320 in words is "one billion, three hundred twelve million, one thousand, three hundred twenty".