129784325 has 12 divisors (see below), whose sum is σ = 175563168. Its totient is φ = 94388400.

The previous prime is 129784313. The next prime is 129784327. The reversal of 129784325 is 523487921.

It is a de Polignac number, because none of the positive numbers 2^k-129784325 is a prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129784327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235697 + ... + 236246.

It is an arithmetic number, because the mean of its divisors is an integer number (14630264).

Almost surely, 2^129784325 is an apocalyptic number.

It is an amenable number.

129784325 is a deficient number, since it is larger than the sum of its proper divisors (45778843).

129784325 is a wasteful number, since it uses less digits than its factorization.

129784325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471964 (or 471959 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 129784325 is about 11392.2923505324. The cubic root of 129784325 is about 506.2994017736.

The spelling of 129784325 in words is "one hundred twenty-nine million, seven hundred eighty-four thousand, three hundred twenty-five".