129070127 has 4 divisors (see below), whose sum is σ = 129126936. Its totient is φ = 129013320.

The previous prime is 129070087. The next prime is 129070169. The reversal of 129070127 is 721070921.

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

It is a cyclic number.

It is not a de Polignac number, because 129070127 - 2¹⁰ = 129069103 is a prime.

It is a super-2 number, since 2×129070127² = 33318195367592258, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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 129070127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129070027) 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, 24848 + ... + 29589.

It is an arithmetic number, because the mean of its divisors is an integer number (32281734).

Almost surely, 2^129070127 is an apocalyptic number.

129070127 is a deficient number, since it is larger than the sum of its proper divisors (56809).

129070127 is an equidigital number, since it uses as much as digits as its factorization.

129070127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56808.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 129070127 is about 11360.9034411881. The cubic root of 129070127 is about 505.3689778004.

It can be divided in two parts, 1290 and 70127, that added together give a palindrome (71417).

The spelling of 129070127 in words is "one hundred twenty-nine million, seventy thousand, one hundred twenty-seven".