129122345 has 32 divisors (see below), whose sum is σ = 178274304. Its totient is φ = 88862400.

The previous prime is 129122317. The next prime is 129122351. The reversal of 129122345 is 543221921.

It is not a de Polignac number, because 129122345 - 2⁶ = 129122281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129800 + ... + 130790.

It is an arithmetic number, because the mean of its divisors is an integer number (5571072).

Almost surely, 2^129122345 is an apocalyptic number.

It is an amenable number.

129122345 is a deficient number, since it is larger than the sum of its proper divisors (49151959).

129122345 is a wasteful number, since it uses less digits than its factorization.

129122345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133.

The product of its digits is 4320, while the sum is 29.

The square root of 129122345 is about 11363.2013534919. The cubic root of 129122345 is about 505.4371211163.

The spelling of 129122345 in words is "one hundred twenty-nine million, one hundred twenty-two thousand, three hundred forty-five".