280541 has 2 divisors, whose sum is σ = 280542. Its totient is φ = 280540.

The previous prime is 280537. The next prime is 280547. The reversal of 280541 is 145082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143641 + 136900 = 379^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 280541 - 2² = 280537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280547) 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, 140270 + 140271.

It is an arithmetic number, because the mean of its divisors is an integer number (140271).

2²⁸⁰⁵⁴¹ is an apocalyptic number.

It is an amenable number.

280541 is a deficient number, since it is larger than the sum of its proper divisors (1).

280541 is an equidigital number, since it uses as much as digits as its factorization.

280541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 280541 is about 529.6612124745. The cubic root of 280541 is about 65.4634335456.

The spelling of 280541 in words is "two hundred eighty thousand, five hundred forty-one".