285097 has 4 divisors (see below), whose sum is σ = 287316. Its totient is φ = 282880.

The previous prime is 285091. The next prime is 285101. The reversal of 285097 is 790582.

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

It can be written as a sum of positive squares in 2 ways, for example, as 137641 + 147456 = 371^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 285097 - 2⁷ = 284969 is a prime.

It is a Duffinian number.

285097 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (285091) 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, 904 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (71829).

2²⁸⁵⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

285097 is a deficient number, since it is larger than the sum of its proper divisors (2219).

285097 is a wasteful number, since it uses less digits than its factorization.

285097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 285097 is about 533.9447536965. The cubic root of 285097 is about 65.8159087927.

The spelling of 285097 in words is "two hundred eighty-five thousand, ninety-seven".