1299121144 has 16 divisors (see below), whose sum is σ = 2541759120. Its totient is φ = 621318720.

The previous prime is 1299121141. The next prime is 1299121217. The reversal of 1299121144 is 4411219921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299121141) by changing a digit.

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, 3530037 + ... + 3530404.

It is an arithmetic number, because the mean of its divisors is an integer number (158859945).

Almost surely, 2^1299121144 is an apocalyptic number.

It is an amenable number.

1299121144 is a deficient number, since it is larger than the sum of its proper divisors (1242637976).

1299121144 is a wasteful number, since it uses less digits than its factorization.

1299121144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7060470 (or 7060466 counting only the distinct ones).

The product of its digits is 5184, while the sum is 34.

The square root of 1299121144 is about 36043.3231542265. The cubic root of 1299121144 is about 1091.1468847500.

The spelling of 1299121144 in words is "one billion, two hundred ninety-nine million, one hundred twenty-one thousand, one hundred forty-four".