280261 has 8 divisors (see below), whose sum is σ = 293760. Its totient is φ = 267168.

The previous prime is 280253. The next prime is 280277. The reversal of 280261 is 162082.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 280261 - 2³ = 280253 is a prime.

It is a super-3 number, since 3×280261³ = 66040333318258743, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2² + 8² + 2⁸ + 0 + 6⁷ + 1 .

It is a Duffinian number.

280261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280061) 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, 3105 + ... + 3193.

It is an arithmetic number, because the mean of its divisors is an integer number (36720).

2²⁸⁰²⁶¹ is an apocalyptic number.

It is an amenable number.

280261 is a deficient number, since it is larger than the sum of its proper divisors (13499).

280261 is an equidigital number, since it uses as much as digits as its factorization.

280261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 280261 is about 529.3968265866. The cubic root of 280261 is about 65.4416472317.

The spelling of 280261 in words is "two hundred eighty thousand, two hundred sixty-one".