8269561 has 4 divisors (see below), whose sum is σ = 8349952. Its totient is φ = 8189172.

The previous prime is 8269559. The next prime is 8269567. The reversal of 8269561 is 1659628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8269561 - 2¹ = 8269559 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 8269561.

It is not an unprimeable number, because it can be changed into a prime (8269567) 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, 40041 + ... + 40246.

It is an arithmetic number, because the mean of its divisors is an integer number (2087488).

Almost surely, 2^8269561 is an apocalyptic number.

It is an amenable number.

8269561 is a deficient number, since it is larger than the sum of its proper divisors (80391).

8269561 is a wasteful number, since it uses less digits than its factorization.

8269561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80390.

The product of its digits is 25920, while the sum is 37.

The square root of 8269561 is about 2875.6844402681. The cubic root of 8269561 is about 202.2215733564.

The spelling of 8269561 in words is "eight million, two hundred sixty-nine thousand, five hundred sixty-one".