129229544 has 8 divisors (see below), whose sum is σ = 242305410. Its totient is φ = 64614768.

The previous prime is 129229531. The next prime is 129229547. The reversal of 129229544 is 445922921.

It can be written as a sum of positive squares in only one way, i.e., 128822500 + 407044 = 11350^2 + 638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 129229498 and 129229507.

It is not an unprimeable number, because it can be changed into a prime (129229547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8076839 + ... + 8076854.

Almost surely, 2^129229544 is an apocalyptic number.

It is an amenable number.

129229544 is a deficient number, since it is larger than the sum of its proper divisors (113075866).

129229544 is a wasteful number, since it uses less digits than its factorization.

129229544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16153699 (or 16153695 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 129229544 is about 11367.9173114516. The cubic root of 129229544 is about 505.5769558510.

The spelling of 129229544 in words is "one hundred twenty-nine million, two hundred twenty-nine thousand, five hundred forty-four".