1166785142 has 16 divisors (see below), whose sum is σ = 1785696192. Its totient is φ = 571584000.

The previous prime is 1166785129. The next prime is 1166785171. The reversal of 1166785142 is 2415876611.

It is a super-2 number, since 2×1166785142² = 2722775135183920328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1166785142.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 72278 + ... + 86934.

It is an arithmetic number, because the mean of its divisors is an integer number (111606012).

Almost surely, 2^1166785142 is an apocalyptic number.

1166785142 is a deficient number, since it is larger than the sum of its proper divisors (618911050).

1166785142 is a wasteful number, since it uses less digits than its factorization.

1166785142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15463.

The product of its digits is 80640, while the sum is 41.

The square root of 1166785142 is about 34158.2368104678. The cubic root of 1166785142 is about 1052.7622332989.

The spelling of 1166785142 in words is "one billion, one hundred sixty-six million, seven hundred eighty-five thousand, one hundred forty-two".