280601 has 4 divisors (see below), whose sum is σ = 281892. Its totient is φ = 279312.

The previous prime is 280597. The next prime is 280603. The reversal of 280601 is 106082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15376 + 265225 = 124^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 280601 - 2² = 280597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 280601.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280601.

It is not an unprimeable number, because it can be changed into a prime (280603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230 + ... + 783.

It is an arithmetic number, because the mean of its divisors is an integer number (70473).

It is a Poulet number, since it divides 2²⁸⁰⁶⁰⁰-1.

2²⁸⁰⁶⁰¹ is an apocalyptic number.

It is an amenable number.

280601 is a deficient number, since it is larger than the sum of its proper divisors (1291).

280601 is a wasteful number, since it uses less digits than its factorization.

280601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 280601 is about 529.7178494255. The cubic root of 280601 is about 65.4681001553.

Adding to 280601 its reverse (106082), we get a palindrome (386683).

The spelling of 280601 in words is "two hundred eighty thousand, six hundred one".