1299844161 has 24 divisors (see below), whose sum is σ = 2340846144. Its totient is φ = 675243360.

The previous prime is 1299844141. The next prime is 1299844171. The reversal of 1299844161 is 1614489921.

It is a happy number.

It is not a de Polignac number, because 1299844161 - 2¹³ = 1299835969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299844141) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 937146 + ... + 938531.

It is an arithmetic number, because the mean of its divisors is an integer number (97535256).

Almost surely, 2^1299844161 is an apocalyptic number.

1299844161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1299844161 is a deficient number, since it is larger than the sum of its proper divisors (1041001983).

1299844161 is a wasteful number, since it uses less digits than its factorization.

1299844161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875701 (or 1875698 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1299844161 is about 36053.3515917730. The cubic root of 1299844161 is about 1091.3492706580.

The spelling of 1299844161 in words is "one billion, two hundred ninety-nine million, eight hundred forty-four thousand, one hundred sixty-one".