8424561 has 4 divisors (see below), whose sum is σ = 11232752. Its totient is φ = 5616372.

The previous prime is 8424539. The next prime is 8424569. The reversal of 8424561 is 1654248.

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 not a de Polignac number, because 8424561 - 2⁶ = 8424497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8424569) 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, 1404091 + ... + 1404096.

It is an arithmetic number, because the mean of its divisors is an integer number (2808188).

Almost surely, 2^8424561 is an apocalyptic number.

It is an amenable number.

8424561 is a deficient number, since it is larger than the sum of its proper divisors (2808191).

8424561 is a wasteful number, since it uses less digits than its factorization.

8424561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808190.

The product of its digits is 7680, while the sum is 30.

The square root of 8424561 is about 2902.5094315092. The cubic root of 8424561 is about 203.4772032651.

The spelling of 8424561 in words is "eight million, four hundred twenty-four thousand, five hundred sixty-one".