1142785478 has 16 divisors (see below), whose sum is σ = 1763185104. Its totient is φ = 555104160.

The previous prime is 1142785453. The next prime is 1142785517. The reversal of 1142785478 is 8745872411.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 38693 + ... + 61503.

It is an arithmetic number, because the mean of its divisors is an integer number (110199069).

Almost surely, 2^1142785478 is an apocalyptic number.

1142785478 is a deficient number, since it is larger than the sum of its proper divisors (620399626).

1142785478 is a wasteful number, since it uses less digits than its factorization.

1142785478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23527.

The product of its digits is 501760, while the sum is 47.

The square root of 1142785478 is about 33805.1102349926. The cubic root of 1142785478 is about 1045.4940630575.

The spelling of 1142785478 in words is "one billion, one hundred forty-two million, seven hundred eighty-five thousand, four hundred seventy-eight".