Search a number
-
+
123806 = 2103601
BaseRepresentation
bin11110001110011110
320021211102
4132032132
512430211
62353102
71023644
oct361636
9207742
10123806
1185021
125b792
1344477
1433194
1526a3b
hex1e39e

123806 has 8 divisors (see below), whose sum is σ = 187824. Its totient is φ = 61200.

The previous prime is 123803. The next prime is 123817. The reversal of 123806 is 608321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (23478).

2123806 is an apocalyptic number.

123806 is a deficient number, since it is larger than the sum of its proper divisors (64018).

123806 is a wasteful number, since it uses less digits than its factorization.

123806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 123806 is about 351.8607679182. The cubic root of 123806 is about 49.8402904000.

It can be divided in two parts, 123 and 806, that added together give a palindrome (929).

The spelling of 123806 in words is "one hundred twenty-three thousand, eight hundred six".

Divisors: 1 2 103 206 601 1202 61903 123806