1312775740 has 24 divisors (see below), whose sum is σ = 2901926160. Its totient is φ = 497472768.

The previous prime is 1312775713. The next prime is 1312775743. The reversal of 1312775740 is 475772131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312775740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312775743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1726957 + ... + 1727716.

It is an arithmetic number, because the mean of its divisors is an integer number (120913590).

Almost surely, 2^1312775740 is an apocalyptic number.

1312775740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312775740 is an abundant number, since it is smaller than the sum of its proper divisors (1589150420).

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

1312775740 is a wasteful number, since it uses less digits than its factorization.

1312775740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454701 (or 3454699 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 1312775740 is about 36232.2472391653. The cubic root of 1312775740 is about 1094.9564531656.

The spelling of 1312775740 in words is "one billion, three hundred twelve million, seven hundred seventy-five thousand, seven hundred forty".