1312002340 has 96 divisors (see below), whose sum is σ = 3244872960. Its totient is φ = 440563200.

The previous prime is 1312002323. The next prime is 1312002343. The reversal of 1312002340 is 432002131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1312002343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142270 + ... + 151210.

It is an arithmetic number, because the mean of its divisors is an integer number (33800760).

Almost surely, 2^1312002340 is an apocalyptic number.

1312002340 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 1312002340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622436480).

1312002340 is an abundant number, since it is smaller than the sum of its proper divisors (1932870620).

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

1312002340 is a wasteful number, since it uses less digits than its factorization.

1312002340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9013 (or 9011 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1312002340 is about 36221.5728537566. The cubic root of 1312002340 is about 1094.7413857960.

Adding to 1312002340 its reverse (432002131), we get a palindrome (1744004471).

The spelling of 1312002340 in words is "one billion, three hundred twelve million, two thousand, three hundred forty".