129997185 has 8 divisors (see below), whose sum is σ = 207995520. Its totient is φ = 69331824.

The previous prime is 129997171. The next prime is 129997193. The reversal of 129997185 is 581799921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129997185 - 2⁷ = 129997057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4333225 + ... + 4333254.

It is an arithmetic number, because the mean of its divisors is an integer number (25999440).

Almost surely, 2^129997185 is an apocalyptic number.

129997185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129997185 is a deficient number, since it is larger than the sum of its proper divisors (77998335).

129997185 is an equidigital number, since it uses as much as digits as its factorization.

129997185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8666487.

The product of its digits is 408240, while the sum is 51.

The square root of 129997185 is about 11401.6308044069. The cubic root of 129997185 is about 506.5760454174.

The spelling of 129997185 in words is "one hundred twenty-nine million, nine hundred ninety-seven thousand, one hundred eighty-five".