864147 has 4 divisors (see below), whose sum is σ = 1152200. Its totient is φ = 576096.

The previous prime is 864137. The next prime is 864151. The reversal of 864147 is 741468.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 864147 - 2⁴ = 864131 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144022 + ... + 144027.

It is an arithmetic number, because the mean of its divisors is an integer number (288050).

2⁸⁶⁴¹⁴⁷ is an apocalyptic number.

864147 is a deficient number, since it is larger than the sum of its proper divisors (288053).

864147 is a wasteful number, since it uses less digits than its factorization.

864147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288052.

The product of its digits is 5376, while the sum is 30.

The square root of 864147 is about 929.5950731367. The cubic root of 864147 is about 95.2494643848.

The spelling of 864147 in words is "eight hundred sixty-four thousand, one hundred forty-seven".