287481 has 8 divisors (see below), whose sum is σ = 388480. Its totient is φ = 189072.

The previous prime is 287449. The next prime is 287491. The reversal of 287481 is 184782.

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

It is not a de Polignac number, because 287481 - 2⁵ = 287449 is a prime.

It is a super-2 number, since 2×287481² = 165290650722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287481.

It is not an unprimeable number, because it can be changed into a prime (287491) 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, 370 + ... + 843.

It is an arithmetic number, because the mean of its divisors is an integer number (48560).

2²⁸⁷⁴⁸¹ is an apocalyptic number.

It is an amenable number.

287481 is a deficient number, since it is larger than the sum of its proper divisors (100999).

287481 is a wasteful number, since it uses less digits than its factorization.

287481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295.

The product of its digits is 3584, while the sum is 30.

The square root of 287481 is about 536.1725468541. The cubic root of 287481 is about 65.9988521380.

The spelling of 287481 in words is "two hundred eighty-seven thousand, four hundred eighty-one".