823126 has 4 divisors (see below), whose sum is σ = 1234692. Its totient is φ = 411562.

The previous prime is 823117. The next prime is 823127. The reversal of 823126 is 621328.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 823097 and 823106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823127) by changing a digit.

823126 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 205780 + ... + 205783.

It is an arithmetic number, because the mean of its divisors is an integer number (308673).

2⁸²³¹²⁶ is an apocalyptic number.

823126 is a deficient number, since it is larger than the sum of its proper divisors (411566).

823126 is a wasteful number, since it uses less digits than its factorization.

823126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411565.

The product of its digits is 576, while the sum is 22.

The square root of 823126 is about 907.2629166895. The cubic root of 823126 is about 93.7178046485.

It can be divided in two parts, 823 and 126, that added together give a palindrome (949).

The spelling of 823126 in words is "eight hundred twenty-three thousand, one hundred twenty-six".