1200001312 has 12 divisors (see below), whose sum is σ = 2362502646. Its totient is φ = 600000640.

The previous prime is 1200001303. The next prime is 1200001331. The reversal of 1200001312 is 2131000021.

It can be written as a sum of positive squares in only one way, i.e., 831514896 + 368486416 = 28836^2 + 19196^2 .

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 as a sum of consecutive naturals, namely, 18749989 + ... + 18750052.

Almost surely, 2^1200001312 is an apocalyptic number.

It is an amenable number.

1200001312 is a deficient number, since it is larger than the sum of its proper divisors (1162501334).

1200001312 is an equidigital number, since it uses as much as digits as its factorization.

1200001312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37500051 (or 37500043 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1200001312 is about 34641.0350884612. The cubic root of 1200001312 is about 1062.6589564625.

Adding to 1200001312 its reverse (2131000021), we get a palindrome (3331001333).

The spelling of 1200001312 in words is "one billion, two hundred million, one thousand, three hundred twelve".