129508485 has 8 divisors (see below), whose sum is σ = 207213600. Its totient is φ = 69071184.

The previous prime is 129508471. The next prime is 129508493. The reversal of 129508485 is 584805921.

It is a happy number.

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

It is not a de Polignac number, because 129508485 - 2¹⁴ = 129492101 is a prime.

It is a congruent number.

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, 4316935 + ... + 4316964.

It is an arithmetic number, because the mean of its divisors is an integer number (25901700).

Almost surely, 2^129508485 is an apocalyptic number.

129508485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129508485 is a deficient number, since it is larger than the sum of its proper divisors (77705115).

129508485 is an equidigital number, since it uses as much as digits as its factorization.

129508485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8633907.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 129508485 is about 11380.1794801312. The cubic root of 129508485 is about 505.9404557928.

The spelling of 129508485 in words is "one hundred twenty-nine million, five hundred eight thousand, four hundred eighty-five".