129382725 has 24 divisors (see below), whose sum is σ = 214589440. Its totient is φ = 68785920.

The previous prime is 129382711. The next prime is 129382727. The reversal of 129382725 is 527283921.

It is not a de Polignac number, because 129382725 - 2⁴ = 129382709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129382727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22716 + ... + 27834.

Almost surely, 2^129382725 is an apocalyptic number.

129382725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129382725 is a deficient number, since it is larger than the sum of its proper divisors (85206715).

129382725 is a wasteful number, since it uses less digits than its factorization.

129382725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5469 (or 5464 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 129382725 is about 11374.6527419522. The cubic root of 129382725 is about 505.7766372395.

The spelling of 129382725 in words is "one hundred twenty-nine million, three hundred eighty-two thousand, seven hundred twenty-five".