287251 has 2 divisors, whose sum is σ = 287252. Its totient is φ = 287250.

The previous prime is 287239. The next prime is 287257. The reversal of 287251 is 152782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 287251 - 2⁵ = 287219 is a prime.

It is not a weakly prime, because it can be changed into another prime (287257) 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 as a sum of consecutive naturals, namely, 143625 + 143626.

It is an arithmetic number, because the mean of its divisors is an integer number (143626).

2²⁸⁷²⁵¹ is an apocalyptic number.

287251 is a deficient number, since it is larger than the sum of its proper divisors (1).

287251 is an equidigital number, since it uses as much as digits as its factorization.

287251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 25.

The square root of 287251 is about 535.9580207442. The cubic root of 287251 is about 65.9812465849.

The spelling of 287251 in words is "two hundred eighty-seven thousand, two hundred fifty-one".