1312602660 has 36 divisors (see below), whose sum is σ = 3981561948. Its totient is φ = 350027328.

The previous prime is 1312602653. The next prime is 1312602661. The reversal of 1312602660 is 662062131.

It can be written as a sum of positive squares in 2 ways, for example, as 437981184 + 874621476 = 20928^2 + 29574^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1312602661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3645939 + ... + 3646298.

It is an arithmetic number, because the mean of its divisors is an integer number (110598943).

Almost surely, 2^1312602660 is an apocalyptic number.

1312602660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312602660 is an abundant number, since it is smaller than the sum of its proper divisors (2668959288).

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

1312602660 is a wasteful number, since it uses less digits than its factorization.

1312602660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7292252 (or 7292247 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1312602660 is about 36229.8586803758. The cubic root of 1312602660 is about 1094.9083303506.

Adding to 1312602660 its reverse (662062131), we get a palindrome (1974664791).

The spelling of 1312602660 in words is "one billion, three hundred twelve million, six hundred two thousand, six hundred sixty".