129725944 has 16 divisors (see below), whose sum is σ = 245511000. Its totient is φ = 64256352.

The previous prime is 129725941. The next prime is 129725971. The reversal of 129725944 is 449527921.

It is a super-2 number, since 2×129725944² = 33657641093382272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129725944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129725941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74919 + ... + 76630.

Almost surely, 2^129725944 is an apocalyptic number.

It is an amenable number.

129725944 is a deficient number, since it is larger than the sum of its proper divisors (115785056).

129725944 is a wasteful number, since it uses less digits than its factorization.

129725944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151662 (or 151658 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 129725944 is about 11389.7297597441. The cubic root of 129725944 is about 506.2234740153.

The spelling of 129725944 in words is "one hundred twenty-nine million, seven hundred twenty-five thousand, nine hundred forty-four".