247287 has 8 divisors (see below), whose sum is σ = 340480. Its totient is φ = 159480.

The previous prime is 247279. The next prime is 247301. The reversal of 247287 is 782742.

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

It is not a de Polignac number, because 247287 - 2³ = 247279 is a prime.

It is a super-2 number, since 2×247287² = 122301720738, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

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 247287.

It is not an unprimeable number, because it can be changed into a prime (247087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1237 + ... + 1422.

It is an arithmetic number, because the mean of its divisors is an integer number (42560).

2²⁴⁷²⁸⁷ is an apocalyptic number.

247287 is a deficient number, since it is larger than the sum of its proper divisors (93193).

247287 is a wasteful number, since it uses less digits than its factorization.

247287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693.

The product of its digits is 6272, while the sum is 30.

The square root of 247287 is about 497.2795994207. The cubic root of 247287 is about 62.7673454586.

The spelling of 247287 in words is "two hundred forty-seven thousand, two hundred eighty-seven".