285967 has 4 divisors (see below), whose sum is σ = 311976. Its totient is φ = 259960.

The previous prime is 285953. The next prime is 285977. The reversal of 285967 is 769582.

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

It is a cyclic number.

It is not a de Polignac number, because 285967 - 2⁷ = 285839 is a prime.

It is an Ulam number.

It is a Duffinian number.

285967 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285937) 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, 12988 + ... + 13009.

It is an arithmetic number, because the mean of its divisors is an integer number (77994).

2²⁸⁵⁹⁶⁷ is an apocalyptic number.

285967 is a deficient number, since it is larger than the sum of its proper divisors (26009).

285967 is a wasteful number, since it uses less digits than its factorization.

285967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26008.

The product of its digits is 30240, while the sum is 37.

The square root of 285967 is about 534.7588241441. The cubic root of 285967 is about 65.8827885969.

It can be divided in two parts, 2859 and 67, that added together give a triangular number (2926 = T₇₆).

The spelling of 285967 in words is "two hundred eighty-five thousand, nine hundred sixty-seven".