287123 has 8 divisors (see below), whose sum is σ = 302400. Its totient is φ = 272320.

The previous prime is 287117. The next prime is 287137. The reversal of 287123 is 321782.

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

It is a cyclic number.

It is not a de Polignac number, because 287123 - 2⁴ = 287107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287173) 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, 1853 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2²⁸⁷¹²³ is an apocalyptic number.

287123 is a deficient number, since it is larger than the sum of its proper divisors (15277).

287123 is a wasteful number, since it uses less digits than its factorization.

287123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its digits is 672, while the sum is 23.

The square root of 287123 is about 535.8385951012. The cubic root of 287123 is about 65.9714446413.

The spelling of 287123 in words is "two hundred eighty-seven thousand, one hundred twenty-three".