129551036 has 12 divisors (see below), whose sum is σ = 228370128. Its totient is φ = 64302432.

The previous prime is 129551017. The next prime is 129551039. The reversal of 129551036 is 630155921.

129551036 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 129550993 and 129551011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129551039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117656 + ... + 118751.

It is an arithmetic number, because the mean of its divisors is an integer number (19030844).

Almost surely, 2^129551036 is an apocalyptic number.

It is an amenable number.

129551036 is a deficient number, since it is larger than the sum of its proper divisors (98819092).

129551036 is a wasteful number, since it uses less digits than its factorization.

129551036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236548 (or 236546 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 129551036 is about 11382.0488489551. The cubic root of 129551036 is about 505.9958599233.

The spelling of 129551036 in words is "one hundred twenty-nine million, five hundred fifty-one thousand, thirty-six".