123426 has 12 divisors (see below), whose sum is σ = 267462. Its totient is φ = 41136.

The previous prime is 123419. The next prime is 123427. The reversal of 123426 is 624321.

It is a happy number.

123426 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in only one way, i.e., 123201 + 225 = 351^2 + 15^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 6857 = 123426 / (1 + 2 + 3 + 4 + 2 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 123399 and 123408.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 123426.

It is not an unprimeable number, because it can be changed into a prime (123427) by changing a digit.

123426 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 (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3411 + ... + 3446.

2¹²³⁴²⁶ is an apocalyptic number.

123426 is an abundant number, since it is smaller than the sum of its proper divisors (144036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123426 is a wasteful number, since it uses less digits than its factorization.

123426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6865 (or 6862 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 123426 is about 351.3203666171. The cubic root of 123426 is about 49.7892462385.

Adding to 123426 its reverse (624321), we get a palindrome (747747).

The spelling of 123426 in words is "one hundred twenty-three thousand, four hundred twenty-six".