280507 has 2 divisors, whose sum is σ = 280508. Its totient is φ = 280506.

The previous prime is 280499. The next prime is 280513. The reversal of 280507 is 705082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280507 - 2³ = 280499 is a prime.

It is a Chen prime.

280507 is a lucky number.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (280537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140253 + 140254.

It is an arithmetic number, because the mean of its divisors is an integer number (140254).

2²⁸⁰⁵⁰⁷ is an apocalyptic number.

280507 is a deficient number, since it is larger than the sum of its proper divisors (1).

280507 is an equidigital number, since it uses as much as digits as its factorization.

280507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 280507 is about 529.6291155139. The cubic root of 280507 is about 65.4607888381.

Adding to 280507 its reverse (705082), we get a palindrome (985589).

It can be divided in two parts, 280 and 507, that added together give a palindrome (787).

The spelling of 280507 in words is "two hundred eighty thousand, five hundred seven".