1312002020 has 48 divisors (see below), whose sum is σ = 3153644928. Its totient is φ = 449137920.

The previous prime is 1312002017. The next prime is 1312002049. The reversal of 1312002020 is 202002131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1312001992 and 1312002010.

It is an unprimeable number.

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, 88760 + ... + 102480.

It is an arithmetic number, because the mean of its divisors is an integer number (65700936).

Almost surely, 2^1312002020 is an apocalyptic number.

1312002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312002020 is an abundant number, since it is smaller than the sum of its proper divisors (1841642908).

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

1312002020 is a wasteful number, since it uses less digits than its factorization.

1312002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14420 (or 14418 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1312002020 is about 36221.5684364993. The cubic root of 1312002020 is about 1094.7412967928.

Adding to 1312002020 its reverse (202002131), we get a palindrome (1514004151).

The spelling of 1312002020 in words is "one billion, three hundred twelve million, two thousand, twenty".