123402122 has 8 divisors (see below), whose sum is σ = 185871972. Its totient is φ = 61444800.

The previous prime is 123402109. The next prime is 123402127. The reversal of 123402122 is 221204321.

It can be written as a sum of positive squares in 2 ways, for example, as 114939841 + 8462281 = 10721^2 + 2909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123402122.

It is not an unprimeable number, because it can be changed into a prime (123402127) 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 3 ways as a sum of consecutive naturals, for example, 127529 + ... + 128492.

Almost surely, 2^123402122 is an apocalyptic number.

123402122 is a deficient number, since it is larger than the sum of its proper divisors (62469850).

123402122 is a wasteful number, since it uses less digits than its factorization.

123402122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256264.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 123402122 is about 11108.6507731587. The cubic root of 123402122 is about 497.8603528811.

Adding to 123402122 its reverse (221204321), we get a palindrome (344606443).

The spelling of 123402122 in words is "one hundred twenty-three million, four hundred two thousand, one hundred twenty-two".