1142781563 has 16 divisors (see below), whose sum is σ = 1431177216. Its totient is φ = 886472640.

The previous prime is 1142781557. The next prime is 1142781589. The reversal of 1142781563 is 3651872411.

It is a cyclic number.

It is not a de Polignac number, because 1142781563 - 2¹⁴ = 1142765179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142781553) 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, 16106 + ... + 50447.

It is an arithmetic number, because the mean of its divisors is an integer number (89448576).

Almost surely, 2^1142781563 is an apocalyptic number.

1142781563 is a deficient number, since it is larger than the sum of its proper divisors (288395653).

1142781563 is a wasteful number, since it uses less digits than its factorization.

1142781563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66794.

The product of its digits is 40320, while the sum is 38.

The square root of 1142781563 is about 33805.0523294965. The cubic root of 1142781563 is about 1045.4928691578.

The spelling of 1142781563 in words is "one billion, one hundred forty-two million, seven hundred eighty-one thousand, five hundred sixty-three".