129245155 has 16 divisors (see below), whose sum is σ = 168686784. Its totient is φ = 94492800.

The previous prime is 129245147. The next prime is 129245173. The reversal of 129245155 is 551542921.

It is not a de Polignac number, because 129245155 - 2³ = 129245147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129245155.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3279 + ... + 16408.

It is an arithmetic number, because the mean of its divisors is an integer number (10542924).

Almost surely, 2^129245155 is an apocalyptic number.

129245155 is a deficient number, since it is larger than the sum of its proper divisors (39441629).

129245155 is a wasteful number, since it uses less digits than its factorization.

129245155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19806.

The product of its digits is 18000, while the sum is 34.

The square root of 129245155 is about 11368.6039160488. The cubic root of 129245155 is about 505.5973130227.

The spelling of 129245155 in words is "one hundred twenty-nine million, two hundred forty-five thousand, one hundred fifty-five".