129372427 has 8 divisors (see below), whose sum is σ = 132778800. Its totient is φ = 126006624.

The previous prime is 129372413. The next prime is 129372433. The reversal of 129372427 is 724273921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129372427 - 2¹¹ = 129370379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129372497) 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 7 ways as a sum of consecutive naturals, for example, 3628 + ... + 16489.

It is an arithmetic number, because the mean of its divisors is an integer number (16597350).

Almost surely, 2^129372427 is an apocalyptic number.

129372427 is a deficient number, since it is larger than the sum of its proper divisors (3406373).

129372427 is a wasteful number, since it uses less digits than its factorization.

129372427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20285.

The product of its digits is 42336, while the sum is 37.

The square root of 129372427 is about 11374.2000597844. The cubic root of 129372427 is about 505.7632180703.

The spelling of 129372427 in words is "one hundred twenty-nine million, three hundred seventy-two thousand, four hundred twenty-seven".