122222406 has 16 divisors (see below), whose sum is σ = 248452848. Its totient is φ = 40072800.

The previous prime is 122222389. The next prime is 122222407. The reversal of 122222406 is 604222221.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166605 + ... + 167336.

It is an arithmetic number, because the mean of its divisors is an integer number (15528303).

Almost surely, 2^122222406 is an apocalyptic number.

122222406 is an abundant number, since it is smaller than the sum of its proper divisors (126230442).

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

122222406 is a wasteful number, since it uses less digits than its factorization.

122222406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334007.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 122222406 is about 11055.4242795109. The cubic root of 122222406 is about 496.2687663869.

Adding to 122222406 its reverse (604222221), we get a palindrome (726444627).

The spelling of 122222406 in words is "one hundred twenty-two million, two hundred twenty-two thousand, four hundred six".