129425987 has 2 divisors, whose sum is σ = 129425988. Its totient is φ = 129425986.

The previous prime is 129425983. The next prime is 129426013. The reversal of 129425987 is 789524921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129425987 - 2² = 129425983 is a prime.

It is a super-2 number, since 2×129425987² = 33502172221848338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129425983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64712993 + 64712994.

It is an arithmetic number, because the mean of its divisors is an integer number (64712994).

Almost surely, 2^129425987 is an apocalyptic number.

129425987 is a deficient number, since it is larger than the sum of its proper divisors (1).

129425987 is an equidigital number, since it uses as much as digits as its factorization.

129425987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 129425987 is about 11376.5542674397. The cubic root of 129425987 is about 505.8330035242.

The spelling of 129425987 in words is "one hundred twenty-nine million, four hundred twenty-five thousand, nine hundred eighty-seven".