287841 has 4 divisors (see below), whose sum is σ = 383792. Its totient is φ = 191892.

The previous prime is 287821. The next prime is 287849. The reversal of 287841 is 148782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 287841 - 2¹³ = 279649 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 287799 and 287808.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287841.

It is not an unprimeable number, because it can be changed into a prime (287849) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 47971 + ... + 47976.

It is an arithmetic number, because the mean of its divisors is an integer number (95948).

2²⁸⁷⁸⁴¹ is an apocalyptic number.

It is an amenable number.

287841 is a deficient number, since it is larger than the sum of its proper divisors (95951).

287841 is an equidigital number, since it uses as much as digits as its factorization.

287841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95950.

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

The square root of 287841 is about 536.5081546445. The cubic root of 287841 is about 66.0263898141.

It can be divided in two parts, 287 and 841, that added together give a triangular number (1128 = T₄₇).

The spelling of 287841 in words is "two hundred eighty-seven thousand, eight hundred forty-one".