129995000 has 40 divisors (see below), whose sum is σ = 304590000. Its totient is φ = 51996000.

The previous prime is 129994993. The next prime is 129995003. The reversal of 129995000 is 599921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129995003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8000 + ... + 17999.

It is an arithmetic number, because the mean of its divisors is an integer number (7614750).

Almost surely, 2^129995000 is an apocalyptic number.

129995000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129995000 is an abundant number, since it is smaller than the sum of its proper divisors (174595000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129995000 is an equidigital number, since it uses as much as digits as its factorization.

129995000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26025 (or 26006 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 129995000 is about 11401.5349843782. The cubic root of 129995000 is about 506.5732072153.

The spelling of 129995000 in words is "one hundred twenty-nine million, nine hundred ninety-five thousand".