1312123044 has 48 divisors (see below), whose sum is σ = 3197674368. Its totient is φ = 417973248.

The previous prime is 1312122983. The next prime is 1312123061. The reversal of 1312123044 is 4403212131.

It is a self number, because there is not a number n which added to its sum of digits gives 1312123044.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555514 + ... + 557870.

It is an arithmetic number, because the mean of its divisors is an integer number (66618216).

Almost surely, 2^1312123044 is an apocalyptic number.

It is an amenable number.

1312123044 is an abundant number, since it is smaller than the sum of its proper divisors (1885551324).

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

1312123044 is a wasteful number, since it uses less digits than its factorization.

1312123044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4404 (or 4402 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1312123044 is about 36223.2390048157. The cubic root of 1312123044 is about 1094.7749567758.

Adding to 1312123044 its reverse (4403212131), we get a palindrome (5715335175).

The spelling of 1312123044 in words is "one billion, three hundred twelve million, one hundred twenty-three thousand, forty-four".