8423561 has 4 divisors (see below), whose sum is σ = 8470800. Its totient is φ = 8376324.

The previous prime is 8423549. The next prime is 8423563. The reversal of 8423561 is 1653248.

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 a de Polignac number, because none of the positive numbers 2^k-8423561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8423563) 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, 23351 + ... + 23708.

It is an arithmetic number, because the mean of its divisors is an integer number (2117700).

Almost surely, 2^8423561 is an apocalyptic number.

It is an amenable number.

8423561 is a deficient number, since it is larger than the sum of its proper divisors (47239).

8423561 is a wasteful number, since it uses less digits than its factorization.

8423561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47238.

The product of its digits is 5760, while the sum is 29.

The square root of 8423561 is about 2902.3371616682. The cubic root of 8423561 is about 203.4691519947.

The spelling of 8423561 in words is "eight million, four hundred twenty-three thousand, five hundred sixty-one".