129429 has 12 divisors (see below), whose sum is σ = 190476. Its totient is φ = 84672.

The previous prime is 129419. The next prime is 129439. The reversal of 129429 is 924921.

It is an interprime number because it is at equal distance from previous prime (129419) and next prime (129439).

It can be written as a sum of positive squares in 2 ways, for example, as 106929 + 22500 = 327^2 + 150^2 .

It is not a de Polignac number, because 129429 - 2¹⁵ = 96661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 559 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (15873).

2¹²⁹⁴²⁹ is an apocalyptic number.

It is an amenable number.

129429 is a deficient number, since it is larger than the sum of its proper divisors (61047).

129429 is a wasteful number, since it uses less digits than its factorization.

129429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 273 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 129429 is about 359.7624216063. The cubic root of 129429 is about 50.5836928710.

The spelling of 129429 in words is "one hundred twenty-nine thousand, four hundred twenty-nine".