280740241 has 6 divisors (see below), whose sum is σ = 281563526. Its totient is φ = 279919200.

The previous prime is 280740233. The next prime is 280740253. The reversal of 280740241 is 142047082.

It can be written as a sum of positive squares in 3 ways, for example, as 56190016 + 224550225 = 7496^2 + 14985^2 .

It is not a de Polignac number, because 280740241 - 2³ = 280740233 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280740211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211861 + ... + 213181.

Almost surely, 2^280740241 is an apocalyptic number.

It is an amenable number.

280740241 is a deficient number, since it is larger than the sum of its proper divisors (823285).

280740241 is an frugal number, since it uses more digits than its factorization.

280740241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243 (or 1782 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 280740241 is about 16755.3048614461. The cubic root of 280740241 is about 654.7892731597.

The spelling of 280740241 in words is "two hundred eighty million, seven hundred forty thousand, two hundred forty-one".