285127 has 4 divisors (see below), whose sum is σ = 286560. Its totient is φ = 283696.

The previous prime is 285121. The next prime is 285139. The reversal of 285127 is 721582.

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 285127 - 2³ = 285119 is a prime.

It is a super-2 number, since 2×285127² = 162594812258, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁵ + 8³ + 1 + 5⁵ + 2¹⁷ + 7⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285121) 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, 358 + ... + 835.

It is an arithmetic number, because the mean of its divisors is an integer number (71640).

2²⁸⁵¹²⁷ is an apocalyptic number.

285127 is a deficient number, since it is larger than the sum of its proper divisors (1433).

285127 is a wasteful number, since it uses less digits than its factorization.

285127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432.

The product of its digits is 1120, while the sum is 25.

The square root of 285127 is about 533.9728457515. The cubic root of 285127 is about 65.8182172562.

The spelling of 285127 in words is "two hundred eighty-five thousand, one hundred twenty-seven".