129085203 has 16 divisors (see below), whose sum is σ = 185713920. Its totient is φ = 79282464.

The previous prime is 129085181. The next prime is 129085217. The reversal of 129085203 is 302580921.

It is a happy number.

It is not a de Polignac number, because 129085203 - 2²¹ = 126988051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129085273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19018 + ... + 24896.

It is an arithmetic number, because the mean of its divisors is an integer number (11607120).

Almost surely, 2^129085203 is an apocalyptic number.

129085203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129085203 is a deficient number, since it is larger than the sum of its proper divisors (56628717).

129085203 is a wasteful number, since it uses less digits than its factorization.

129085203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6458.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 129085203 is about 11361.5669253849. The cubic root of 129085203 is about 505.3886535283.

The spelling of 129085203 in words is "one hundred twenty-nine million, eighty-five thousand, two hundred three".