1312302340 has 24 divisors (see below), whose sum is σ = 2756745432. Its totient is φ = 524747520.

The previous prime is 1312302331. The next prime is 1312302359. The reversal of 1312302340 is 432032131.

It can be written as a sum of positive squares in 4 ways, for example, as 101123136 + 1211179204 = 10056^2 + 34802^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63720 + ... + 81760.

It is an arithmetic number, because the mean of its divisors is an integer number (114864393).

Almost surely, 2^1312302340 is an apocalyptic number.

1312302340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312302340 is an abundant number, since it is smaller than the sum of its proper divisors (1444443092).

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

1312302340 is a wasteful number, since it uses less digits than its factorization.

1312302340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21687 (or 21685 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1312302340 is about 36225.7137955900. The cubic root of 1312302340 is about 1094.8248199426.

Adding to 1312302340 its reverse (432032131), we get a palindrome (1744334471).

The spelling of 1312302340 in words is "one billion, three hundred twelve million, three hundred two thousand, three hundred forty".