1312142760 has 64 divisors (see below), whose sum is σ = 4373812800. Its totient is φ = 349904448.

The previous prime is 1312142759. The next prime is 1312142761. The reversal of 1312142760 is 672412131.

It is an interprime number because it is at equal distance from previous prime (1312142759) and next prime (1312142761).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1312142761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606394 + ... + 608553.

It is an arithmetic number, because the mean of its divisors is an integer number (68340825).

Almost surely, 2^1312142760 is an apocalyptic number.

1312142760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312142760 is an abundant number, since it is smaller than the sum of its proper divisors (3061670040).

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

1312142760 is a wasteful number, since it uses less digits than its factorization.

1312142760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214967 (or 1214957 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1312142760 is about 36223.5111495283. The cubic root of 1312142760 is about 1094.7804401221.

Adding to 1312142760 its reverse (672412131), we get a palindrome (1984554891).

The spelling of 1312142760 in words is "one billion, three hundred twelve million, one hundred forty-two thousand, seven hundred sixty".