1289132563 has 16 divisors (see below), whose sum is σ = 1345750560. Its totient is φ = 1233388800.

The previous prime is 1289132557. The next prime is 1289132573. The reversal of 1289132563 is 3652319821.

It is a cyclic number.

It is not a de Polignac number, because 1289132563 - 2⁵ = 1289132531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289132513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2796153 + ... + 2796613.

It is an arithmetic number, because the mean of its divisors is an integer number (84109410).

Almost surely, 2^1289132563 is an apocalyptic number.

1289132563 is a deficient number, since it is larger than the sum of its proper divisors (56617997).

1289132563 is a wasteful number, since it uses less digits than its factorization.

1289132563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158.

The product of its digits is 77760, while the sum is 40.

The square root of 1289132563 is about 35904.4922398298. The cubic root of 1289132563 is about 1088.3431785232.

It can be divided in two parts, 12891 and 32563, that added together give a palindrome (45454).

The spelling of 1289132563 in words is "one billion, two hundred eighty-nine million, one hundred thirty-two thousand, five hundred sixty-three".