123206226 has 64 divisors (see below), whose sum is σ = 297392256. Its totient is φ = 33523200.

The previous prime is 123206201. The next prime is 123206227. The reversal of 123206226 is 622602321.

It is a junction number, because it is equal to n+sod(n) for n = 123206196 and 123206205.

It is not an unprimeable number, because it can be changed into a prime (123206227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29806 + ... + 33686.

It is an arithmetic number, because the mean of its divisors is an integer number (4646754).

Almost surely, 2^123206226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123206226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148696128).

123206226 is an abundant number, since it is smaller than the sum of its proper divisors (174186030).

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

123206226 is a wasteful number, since it uses less digits than its factorization.

123206226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 123206226 is about 11099.8299986982. The cubic root of 123206226 is about 497.5967687995.

Adding to 123206226 its reverse (622602321), we get a palindrome (745808547).

The spelling of 123206226 in words is "one hundred twenty-three million, two hundred six thousand, two hundred twenty-six".