280851 has 8 divisors (see below), whose sum is σ = 377280. Its totient is φ = 185832.

The previous prime is 280843. The next prime is 280859. The reversal of 280851 is 158082.

It is an interprime number because it is at equal distance from previous prime (280843) and next prime (280859).

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

It is not a de Polignac number, because 280851 - 2³ = 280843 is a prime.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280851.

It is not an unprimeable number, because it can be changed into a prime (280859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276 + ... + 798.

It is an arithmetic number, because the mean of its divisors is an integer number (47160).

2²⁸⁰⁸⁵¹ is an apocalyptic number.

280851 is a deficient number, since it is larger than the sum of its proper divisors (96429).

280851 is a wasteful number, since it uses less digits than its factorization.

280851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 280851 is about 529.9537715688. The cubic root of 280851 is about 65.4875372050.

Adding to 280851 its sum of digits (24), we get a triangular number (280875 = T₇₄₉).

The spelling of 280851 in words is "two hundred eighty thousand, eight hundred fifty-one".