1312440212 has 12 divisors (see below), whose sum is σ = 2301286260. Its totient is φ = 654929856.

The previous prime is 1312440203. The next prime is 1312440229. The reversal of 1312440212 is 2120442131.

It can be written as a sum of positive squares in 2 ways, for example, as 1003875856 + 308564356 = 31684^2 + 17566^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320273 + ... + 324344.

It is an arithmetic number, because the mean of its divisors is an integer number (191773855).

Almost surely, 2^1312440212 is an apocalyptic number.

It is an amenable number.

1312440212 is a deficient number, since it is larger than the sum of its proper divisors (988846048).

1312440212 is a wasteful number, since it uses less digits than its factorization.

1312440212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645130 (or 645128 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1312440212 is about 36227.6167032831. The cubic root of 1312440212 is about 1094.8631597868.

Adding to 1312440212 its reverse (2120442131), we get a palindrome (3432882343).

The spelling of 1312440212 in words is "one billion, three hundred twelve million, four hundred forty thousand, two hundred twelve".