123266129 has 24 divisors (see below), whose sum is σ = 152631360. Its totient is φ = 97246656.

The previous prime is 123266123. The next prime is 123266141. The reversal of 123266129 is 921662321.

It is a happy number.

It is not a de Polignac number, because 123266129 - 2⁴ = 123266113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123266095 and 123266104.

It is not an unprimeable number, because it can be changed into a prime (123266123) 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 in 23 ways as a sum of consecutive naturals, for example, 181739 + ... + 182415.

It is an arithmetic number, because the mean of its divisors is an integer number (6359640).

Almost surely, 2^123266129 is an apocalyptic number.

123266129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

123266129 is a deficient number, since it is larger than the sum of its proper divisors (29365231).

123266129 is an equidigital number, since it uses as much as digits as its factorization.

123266129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 740 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 123266129 is about 11102.5280454498. The cubic root of 123266129 is about 497.6773997619.

The spelling of 123266129 in words is "one hundred twenty-three million, two hundred sixty-six thousand, one hundred twenty-nine".