287461 has 4 divisors (see below), whose sum is σ = 288652. Its totient is φ = 286272.

The previous prime is 287449. The next prime is 287491. The reversal of 287461 is 164782.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 42436 + 245025 = 206^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 287461 - 2⁷ = 287333 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 90 + ... + 763.

It is an arithmetic number, because the mean of its divisors is an integer number (72163).

2²⁸⁷⁴⁶¹ is an apocalyptic number.

It is an amenable number.

287461 is a deficient number, since it is larger than the sum of its proper divisors (1191).

287461 is an equidigital number, since it uses as much as digits as its factorization.

287461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its digits is 2688, while the sum is 28.

The square root of 287461 is about 536.1538958172. The cubic root of 287461 is about 65.9973215932.

The spelling of 287461 in words is "two hundred eighty-seven thousand, four hundred sixty-one".