129214844 has 24 divisors (see below), whose sum is σ = 251935488. Its totient is φ = 57483440.

The previous prime is 129214843. The next prime is 129214859. The reversal of 129214844 is 448412921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129214843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29174 + ... + 33309.

It is an arithmetic number, because the mean of its divisors is an integer number (10497312).

Almost surely, 2^129214844 is an apocalyptic number.

It is an amenable number.

129214844 is a deficient number, since it is larger than the sum of its proper divisors (122720644).

129214844 is a wasteful number, since it uses less digits than its factorization.

129214844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62545 (or 62543 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 129214844 is about 11367.2707366368. The cubic root of 129214844 is about 505.5577851494.

The spelling of 129214844 in words is "one hundred twenty-nine million, two hundred fourteen thousand, eight hundred forty-four".