280117 has 8 divisors (see below), whose sum is σ = 308160. Its totient is φ = 253440.

The previous prime is 280103. The next prime is 280121. The reversal of 280117 is 711082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a plaindrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 280094 and 280103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117 + ... + 757.

It is an arithmetic number, because the mean of its divisors is an integer number (38520).

2²⁸⁰¹¹⁷ is an apocalyptic number.

It is an amenable number.

280117 is a deficient number, since it is larger than the sum of its proper divisors (28043).

280117 is a wasteful number, since it uses less digits than its factorization.

280117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 280117 is about 529.2608052747. The cubic root of 280117 is about 65.4304371910.

Adding to 280117 its reverse (711082), we get a palindrome (991199).

The spelling of 280117 in words is "two hundred eighty thousand, one hundred seventeen".