1281617113 has 16 divisors (see below), whose sum is σ = 1482880000. Its totient is φ = 1084981392.

The previous prime is 1281617111. The next prime is 1281617123. The reversal of 1281617113 is 3117161821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1281617113 - 2¹ = 1281617111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1281617111) 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 15 ways as a sum of consecutive naturals, for example, 190318 + ... + 196936.

It is an arithmetic number, because the mean of its divisors is an integer number (92680000).

Almost surely, 2^1281617113 is an apocalyptic number.

It is an amenable number.

1281617113 is a deficient number, since it is larger than the sum of its proper divisors (201262887).

1281617113 is a wasteful number, since it uses less digits than its factorization.

1281617113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964.

The product of its digits is 2016, while the sum is 31.

The square root of 1281617113 is about 35799.6803477350. The cubic root of 1281617113 is about 1086.2240958862.

Adding to 1281617113 its reverse (3117161821), we get a palindrome (4398778934).

It can be divided in two parts, 12816 and 17113, that added together give a square (29929 = 173²).

The spelling of 1281617113 in words is "one billion, two hundred eighty-one million, six hundred seventeen thousand, one hundred thirteen".