280671 has 4 divisors (see below), whose sum is σ = 374232. Its totient is φ = 187112.

The previous prime is 280639. The next prime is 280673. The reversal of 280671 is 176082.

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

It is a cyclic number.

It is not a de Polignac number, because 280671 - 2⁵ = 280639 is a prime.

It is a D-number.

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 280671.

It is not an unprimeable number, because it can be changed into a prime (280673) 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, 46776 + ... + 46781.

It is an arithmetic number, because the mean of its divisors is an integer number (93558).

2²⁸⁰⁶⁷¹ is an apocalyptic number.

280671 is a deficient number, since it is larger than the sum of its proper divisors (93561).

280671 is an equidigital number, since it uses as much as digits as its factorization.

280671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93560.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 280671 is about 529.7839182157. The cubic root of 280671 is about 65.4735436926.

The spelling of 280671 in words is "two hundred eighty thousand, six hundred seventy-one".