129018275 has 12 divisors (see below), whose sum is σ = 163704552. Its totient is φ = 100813440.

The previous prime is 129018259. The next prime is 129018277. The reversal of 129018275 is 572810921.

It is not a de Polignac number, because 129018275 - 2⁴ = 129018259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129018277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58934 + ... + 61083.

It is an arithmetic number, because the mean of its divisors is an integer number (13642046).

Almost surely, 2^129018275 is an apocalyptic number.

129018275 is a deficient number, since it is larger than the sum of its proper divisors (34686277).

129018275 is a wasteful number, since it uses less digits than its factorization.

129018275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120070 (or 120065 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 129018275 is about 11358.6211751251. The cubic root of 129018275 is about 505.3012939175.

The spelling of 129018275 in words is "one hundred twenty-nine million, eighteen thousand, two hundred seventy-five".