129420767 has 4 divisors (see below), whose sum is σ = 147909456. Its totient is φ = 110932080.

The previous prime is 129420727. The next prime is 129420803. The reversal of 129420767 is 767024921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 129420767 - 2⁶ = 129420703 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 129420767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129420727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9244334 + ... + 9244347.

It is an arithmetic number, because the mean of its divisors is an integer number (36977364).

Almost surely, 2^129420767 is an apocalyptic number.

129420767 is a deficient number, since it is larger than the sum of its proper divisors (18488689).

129420767 is an equidigital number, since it uses as much as digits as its factorization.

129420767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18488688.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 129420767 is about 11376.3248459245. The cubic root of 129420767 is about 505.8262030254.

The spelling of 129420767 in words is "one hundred twenty-nine million, four hundred twenty thousand, seven hundred sixty-seven".