8280561 has 16 divisors (see below), whose sum is σ = 11845440. Its totient is φ = 5129280.

The previous prime is 8280557. The next prime is 8280577. The reversal of 8280561 is 1650828.

It is not a de Polignac number, because 8280561 - 2² = 8280557 is a prime.

It is a super-3 number, since 3×8280561³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8280511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1651 + ... + 4391.

It is an arithmetic number, because the mean of its divisors is an integer number (740340).

Almost surely, 2^8280561 is an apocalyptic number.

It is an amenable number.

8280561 is a deficient number, since it is larger than the sum of its proper divisors (3564879).

8280561 is a wasteful number, since it uses less digits than its factorization.

8280561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 8280561 is about 2877.5963928251. The cubic root of 8280561 is about 202.3111972891.

The spelling of 8280561 in words is "eight million, two hundred eighty thousand, five hundred sixty-one".