122431306 has 4 divisors (see below), whose sum is σ = 183646962. Its totient is φ = 61215652.

The previous prime is 122431303. The next prime is 122431321. The reversal of 122431306 is 603134221.

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

It can be written as a sum of positive squares in only one way, i.e., 118265625 + 4165681 = 10875^2 + 2041^2 .

It is not an unprimeable number, because it can be changed into a prime (122431303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30607825 + ... + 30607828.

Almost surely, 2^122431306 is an apocalyptic number.

122431306 is a deficient number, since it is larger than the sum of its proper divisors (61215656).

122431306 is an equidigital number, since it uses as much as digits as its factorization.

122431306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61215655.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 122431306 is about 11064.8680968189. The cubic root of 122431306 is about 496.5513428824.

Adding to 122431306 its reverse (603134221), we get a palindrome (725565527).

The spelling of 122431306 in words is "one hundred twenty-two million, four hundred thirty-one thousand, three hundred six".