8419561 has 4 divisors (see below), whose sum is σ = 8428624. Its totient is φ = 8410500.

The previous prime is 8419559. The next prime is 8419571. The reversal of 8419561 is 1659148.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8419561 - 2¹ = 8419559 is a prime.

It is a Duffinian number.

8419561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8419511) 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, 2955 + ... + 5056.

It is an arithmetic number, because the mean of its divisors is an integer number (2107156).

Almost surely, 2^8419561 is an apocalyptic number.

It is an amenable number.

8419561 is a deficient number, since it is larger than the sum of its proper divisors (9063).

8419561 is a wasteful number, since it uses less digits than its factorization.

8419561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9062.

The product of its digits is 8640, while the sum is 34.

The square root of 8419561 is about 2901.6479800279. The cubic root of 8419561 is about 203.4369405397.

The spelling of 8419561 in words is "eight million, four hundred nineteen thousand, five hundred sixty-one".