129150123 has 16 divisors (see below), whose sum is σ = 182095872. Its totient is φ = 81288000.

The previous prime is 129150121. The next prime is 129150127. The reversal of 129150123 is 321051921.

It is not a de Polignac number, because 129150123 - 2¹ = 129150121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129150093 and 129150102.

It is not an unprimeable number, because it can be changed into a prime (129150121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13123 + ... + 20748.

It is an arithmetic number, because the mean of its divisors is an integer number (11380992).

Almost surely, 2^129150123 is an apocalyptic number.

129150123 is a deficient number, since it is larger than the sum of its proper divisors (52945749).

129150123 is a wasteful number, since it uses less digits than its factorization.

129150123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33946.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 129150123 is about 11364.4235665519. The cubic root of 129150123 is about 505.4733632959.

The spelling of 129150123 in words is "one hundred twenty-nine million, one hundred fifty thousand, one hundred twenty-three".