280845601 has 4 divisors (see below), whose sum is σ = 280950804. Its totient is φ = 280740400.

The previous prime is 280845589. The next prime is 280845629. The reversal of 280845601 is 106548082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106548082 = 2 ⋅53274041.

It can be written as a sum of positive squares in 2 ways, for example, as 37454400 + 243391201 = 6120^2 + 15601^2 .

It is a cyclic number.

It is not a de Polignac number, because 280845601 - 2²⁵ = 247291169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280845001) 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, 48490 + ... + 53971.

It is an arithmetic number, because the mean of its divisors is an integer number (70237701).

Almost surely, 2^280845601 is an apocalyptic number.

It is an amenable number.

280845601 is a deficient number, since it is larger than the sum of its proper divisors (105203).

280845601 is a wasteful number, since it uses less digits than its factorization.

280845601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105202.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 280845601 is about 16758.4486453848. The cubic root of 280845601 is about 654.8711756437.

The spelling of 280845601 in words is "two hundred eighty million, eight hundred forty-five thousand, six hundred one".