129347625 has 32 divisors (see below), whose sum is σ = 234808704. Its totient is φ = 62712000.

The previous prime is 129347623. The next prime is 129347629. The reversal of 129347625 is 526743921.

It is not a de Polignac number, because 129347625 - 2¹ = 129347623 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (129347623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11554 + ... + 19803.

It is an arithmetic number, because the mean of its divisors is an integer number (7337772).

Almost surely, 2^129347625 is an apocalyptic number.

129347625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129347625 is a deficient number, since it is larger than the sum of its proper divisors (105461079).

129347625 is a wasteful number, since it uses less digits than its factorization.

129347625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31386 (or 31376 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 129347625 is about 11373.1097330501. The cubic root of 129347625 is about 505.7308960336.

The spelling of 129347625 in words is "one hundred twenty-nine million, three hundred forty-seven thousand, six hundred twenty-five".