861147 has 12 divisors (see below), whose sum is σ = 1421680. Its totient is φ = 492048.

The previous prime is 861139. The next prime is 861163. The reversal of 861147 is 741168.

It is a happy number.

861147 is a `hidden beast` number, since 8 + 611 + 47 = 666.

It is not a de Polignac number, because 861147 - 2³ = 861139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 861147.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861147.

It is not an unprimeable number, because it can be changed into a prime (861167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6772 + ... + 6897.

2⁸⁶¹¹⁴⁷ is an apocalyptic number.

861147 is a deficient number, since it is larger than the sum of its proper divisors (560533).

861147 is a wasteful number, since it uses less digits than its factorization.

861147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13682 (or 13679 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 861147 is about 927.9800644410. The cubic root of 861147 is about 95.1391129039.

The spelling of 861147 in words is "eight hundred sixty-one thousand, one hundred forty-seven".