280305241 has 2 divisors, whose sum is σ = 280305242. Its totient is φ = 280305240.

The previous prime is 280305203. The next prime is 280305251. The reversal of 280305241 is 142503082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199233225 + 81072016 = 14115^2 + 9004^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280305241 is a prime.

It is not a weakly prime, because it can be changed into another prime (280305251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140152620 + 140152621.

It is an arithmetic number, because the mean of its divisors is an integer number (140152621).

Almost surely, 2^280305241 is an apocalyptic number.

It is an amenable number.

280305241 is a deficient number, since it is larger than the sum of its proper divisors (1).

280305241 is an equidigital number, since it uses as much as digits as its factorization.

280305241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 280305241 is about 16742.3188656769. The cubic root of 280305241 is about 654.4509051204.

The spelling of 280305241 in words is "two hundred eighty million, three hundred five thousand, two hundred forty-one".