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561617 = 780231
BaseRepresentation
bin10001001000111010001
31001112101122
42021013101
5120432432
620012025
74526240
oct2110721
91045348
10561617
11353a51
12231015
13168824
14108957
15b1612
hex891d1

561617 has 4 divisors (see below), whose sum is σ = 641856. Its totient is φ = 481380.

The previous prime is 561607. The next prime is 561667. The reversal of 561617 is 716165.

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 561617 - 26 = 561553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561607) 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, 40109 + ... + 40122.

It is an arithmetic number, because the mean of its divisors is an integer number (160464).

2561617 is an apocalyptic number.

It is an amenable number.

561617 is a deficient number, since it is larger than the sum of its proper divisors (80239).

561617 is an equidigital number, since it uses as much as digits as its factorization.

561617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80238.

The product of its digits is 1260, while the sum is 26.

The square root of 561617 is about 749.4111021329. The cubic root of 561617 is about 82.5049645008.

The spelling of 561617 in words is "five hundred sixty-one thousand, six hundred seventeen".

Divisors: 1 7 80231 561617