416561 has 4 divisors (see below), whose sum is σ = 425472. Its totient is φ = 407652.

The previous prime is 416543. The next prime is 416573. The reversal of 416561 is 165614.

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 416561 - 2⁶ = 416497 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (416501) 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, 4385 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (106368).

2⁴¹⁶⁵⁶¹ is an apocalyptic number.

It is an amenable number.

416561 is a deficient number, since it is larger than the sum of its proper divisors (8911).

416561 is an equidigital number, since it uses as much as digits as its factorization.

416561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910.

The product of its digits is 720, while the sum is 23.

The square root of 416561 is about 645.4153701300. The cubic root of 416561 is about 74.6837647741.

The spelling of 416561 in words is "four hundred sixteen thousand, five hundred sixty-one".