1185978671 has 8 divisors (see below), whose sum is σ = 1191743280. Its totient is φ = 1180223488.

The previous prime is 1185978623. The next prime is 1185978679. The reversal of 1185978671 is 1768795811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1185978671 - 2³⁰ = 112236847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1185978679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419300 + ... + 422118.

It is an arithmetic number, because the mean of its divisors is an integer number (148967910).

Almost surely, 2^1185978671 is an apocalyptic number.

1185978671 is a deficient number, since it is larger than the sum of its proper divisors (5764609).

1185978671 is a wasteful number, since it uses less digits than its factorization.

1185978671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4713.

The product of its digits is 846720, while the sum is 53.

The square root of 1185978671 is about 34438.0410447517. The cubic root of 1185978671 is about 1058.5034865833.

The spelling of 1185978671 in words is "one billion, one hundred eighty-five million, nine hundred seventy-eight thousand, six hundred seventy-one".