286139 has 8 divisors (see below), whose sum is σ = 335328. Its totient is φ = 239040.

The previous prime is 286129. The next prime is 286163. The reversal of 286139 is 931682.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-286139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (286129) 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, 212 + ... + 785.

It is an arithmetic number, because the mean of its divisors is an integer number (41916).

2²⁸⁶¹³⁹ is an apocalyptic number.

286139 is a deficient number, since it is larger than the sum of its proper divisors (49189).

286139 is an equidigital number, since it uses as much as digits as its factorization.

286139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045.

The product of its digits is 2592, while the sum is 29.

The square root of 286139 is about 534.9196201300. The cubic root of 286139 is about 65.8959947460.

The spelling of 286139 in words is "two hundred eighty-six thousand, one hundred thirty-nine".