285058 has 4 divisors (see below), whose sum is σ = 427590. Its totient is φ = 142528.

The previous prime is 285049. The next prime is 285071. The reversal of 285058 is 850582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 850582 = 2 ⋅425291.

It can be written as a sum of positive squares in only one way, i.e., 157609 + 127449 = 397^2 + 357^2 .

It is an Ulam number.

It is an unprimeable number.

285058 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71263 + ... + 71266.

2²⁸⁵⁰⁵⁸ is an apocalyptic number.

285058 is a deficient number, since it is larger than the sum of its proper divisors (142532).

285058 is a wasteful number, since it uses less digits than its factorization.

285058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142531.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 285058 is about 533.9082318152. The cubic root of 285058 is about 65.8129075481.

The spelling of 285058 in words is "two hundred eighty-five thousand, fifty-eight".