287501 has 2 divisors, whose sum is σ = 287502. Its totient is φ = 287500.

The previous prime is 287491. The next prime is 287503. The reversal of 287501 is 105782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203401 + 84100 = 451^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 287501 - 2⁶ = 287437 is a prime.

Together with 287503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287501.

It is not a weakly prime, because it can be changed into another prime (287503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143750 + 143751.

It is an arithmetic number, because the mean of its divisors is an integer number (143751).

2²⁸⁷⁵⁰¹ is an apocalyptic number.

It is an amenable number.

287501 is a deficient number, since it is larger than the sum of its proper divisors (1).

287501 is an equidigital number, since it uses as much as digits as its factorization.

287501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 287501 is about 536.1911972422. The cubic root of 287501 is about 66.0003826118. Note that the first 3 decimals are identical.

The spelling of 287501 in words is "two hundred eighty-seven thousand, five hundred one".