129903572 has 6 divisors (see below), whose sum is σ = 227331258. Its totient is φ = 64951784.

The previous prime is 129903569. The next prime is 129903577. The reversal of 129903572 is 275309921.

It can be written as a sum of positive squares in only one way, i.e., 106419856 + 23483716 = 10316^2 + 4846^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129903577) 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 as a sum of consecutive naturals, namely, 16237943 + ... + 16237950.

It is an arithmetic number, because the mean of its divisors is an integer number (37888543).

Almost surely, 2^129903572 is an apocalyptic number.

It is an amenable number.

129903572 is a deficient number, since it is larger than the sum of its proper divisors (97427686).

129903572 is a wasteful number, since it uses less digits than its factorization.

129903572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32475897 (or 32475895 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 129903572 is about 11397.5248190122. The cubic root of 129903572 is about 506.4544184477.

The spelling of 129903572 in words is "one hundred twenty-nine million, nine hundred three thousand, five hundred seventy-two".