280242 has 12 divisors (see below), whose sum is σ = 607230. Its totient is φ = 93408.

The previous prime is 280229. The next prime is 280243. The reversal of 280242 is 242082.

It can be written as a sum of positive squares in only one way, i.e., 251001 + 29241 = 501^2 + 171^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 15569 = 280242 / (2 + 8 + 0 + 2 + 4 + 2).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280242.

It is not an unprimeable number, because it can be changed into a prime (280243) by changing a digit.

280242 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7767 + ... + 7802.

2²⁸⁰²⁴² is an apocalyptic number.

280242 is an abundant number, since it is smaller than the sum of its proper divisors (326988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280242 is a wasteful number, since it uses less digits than its factorization.

280242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15577 (or 15574 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 280242 is about 529.3788813317. The cubic root of 280242 is about 65.4401683490.

The spelling of 280242 in words is "two hundred eighty thousand, two hundred forty-two".