1312872730 has 16 divisors (see below), whose sum is σ = 2544953544. Its totient is φ = 484752960.

The previous prime is 1312872721. The next prime is 1312872749. The reversal of 1312872730 is 372782131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1153077849 + 159794881 = 33957^2 + 12641^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5049381 + ... + 5049640.

Almost surely, 2^1312872730 is an apocalyptic number.

1312872730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312872730 is a deficient number, since it is larger than the sum of its proper divisors (1232080814).

1312872730 is a wasteful number, since it uses less digits than its factorization.

1312872730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10099041.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 1312872730 is about 36233.5856630282. The cubic root of 1312872730 is about 1094.9834182209.

It can be divided in two parts, 13128 and 72730, that added together give a palindrome (85858).

The spelling of 1312872730 in words is "one billion, three hundred twelve million, eight hundred seventy-two thousand, seven hundred thirty".