247281 has 8 divisors (see below), whose sum is σ = 332640. Its totient is φ = 163392.

The previous prime is 247279. The next prime is 247301. The reversal of 247281 is 182742.

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

It is not a de Polignac number, because 247281 - 2¹ = 247279 is a prime.

It is a super-2 number, since 2×247281² = 122295785922, which contains 22 as substring.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247281.

It is not an unprimeable number, because it can be changed into a prime (247201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121 + ... + 713.

It is an arithmetic number, because the mean of its divisors is an integer number (41580).

2²⁴⁷²⁸¹ is an apocalyptic number.

It is an amenable number.

247281 is a deficient number, since it is larger than the sum of its proper divisors (85359).

247281 is a wasteful number, since it uses less digits than its factorization.

247281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735.

The product of its digits is 896, while the sum is 24.

The square root of 247281 is about 497.2735665607. The cubic root of 247281 is about 62.7668378067.

It can be divided in two parts, 247 and 281, that added together give a triangular number (528 = T₃₂).

The spelling of 247281 in words is "two hundred forty-seven thousand, two hundred eighty-one".