561405417 has 4 divisors (see below), whose sum is σ = 748540560. Its totient is φ = 374270276.

The previous prime is 561405409. The next prime is 561405431. The reversal of 561405417 is 714504165.

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 561405417 - 2³ = 561405409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561405457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93567567 + ... + 93567572.

It is an arithmetic number, because the mean of its divisors is an integer number (187135140).

Almost surely, 2^561405417 is an apocalyptic number.

It is an amenable number.

561405417 is a deficient number, since it is larger than the sum of its proper divisors (187135143).

561405417 is a wasteful number, since it uses less digits than its factorization.

561405417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187135142.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 561405417 is about 23693.9953785764. The cubic root of 561405417 is about 824.9460225475.

The spelling of 561405417 in words is "five hundred sixty-one million, four hundred five thousand, four hundred seventeen".