129085910 has 16 divisors (see below), whose sum is σ = 232941312. Its totient is φ = 51504000.

The previous prime is 129085909. The next prime is 129085949. The reversal of 129085910 is 19580921.

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, 12086 + ... + 20105.

It is an arithmetic number, because the mean of its divisors is an integer number (14558832).

Almost surely, 2^129085910 is an apocalyptic number.

129085910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129085910 is a deficient number, since it is larger than the sum of its proper divisors (103855402).

129085910 is a wasteful number, since it uses less digits than its factorization.

129085910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32599.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 129085910 is about 11361.5980390084. The cubic root of 129085910 is about 505.3895761983.

The spelling of 129085910 in words is "one hundred twenty-nine million, eighty-five thousand, nine hundred ten".