247117 has 4 divisors (see below), whose sum is σ = 266140. Its totient is φ = 228096.

The previous prime is 247099. The next prime is 247141. The reversal of 247117 is 711742.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121801 + 125316 = 349^2 + 354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247117 is a prime.

It is a super-2 number, since 2×247117² = 122133623378, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247717) 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, 9492 + ... + 9517.

It is an arithmetic number, because the mean of its divisors is an integer number (66535).

2²⁴⁷¹¹⁷ is an apocalyptic number.

It is an amenable number.

247117 is a deficient number, since it is larger than the sum of its proper divisors (19023).

247117 is a wasteful number, since it uses less digits than its factorization.

247117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19022.

The product of its digits is 392, while the sum is 22.

The square root of 247117 is about 497.1086400376. The cubic root of 247117 is about 62.7529588082.

Adding to 247117 its reverse (711742), we get a palindrome (958859).

The spelling of 247117 in words is "two hundred forty-seven thousand, one hundred seventeen", and thus it is an iban number.