280547 has 2 divisors, whose sum is σ = 280548. Its totient is φ = 280546.

The previous prime is 280541. The next prime is 280549. The reversal of 280547 is 745082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280547 - 2¹⁰ = 279523 is a prime.

Together with 280549, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140273 + 140274.

It is an arithmetic number, because the mean of its divisors is an integer number (140274).

2²⁸⁰⁵⁴⁷ is an apocalyptic number.

280547 is a deficient number, since it is larger than the sum of its proper divisors (1).

280547 is an equidigital number, since it uses as much as digits as its factorization.

280547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 280547 is about 529.6668764422. Note that the first 3 decimals coincide. The cubic root of 280547 is about 65.4639002366.

The spelling of 280547 in words is "two hundred eighty thousand, five hundred forty-seven".