129243675 has 24 divisors (see below), whose sum is σ = 233110080. Its totient is φ = 62663200.

The previous prime is 129243671. The next prime is 129243677. The reversal of 129243675 is 576342921.

It is not a de Polignac number, because 129243675 - 2² = 129243671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129243671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77505 + ... + 79154.

It is an arithmetic number, because the mean of its divisors is an integer number (9712920).

Almost surely, 2^129243675 is an apocalyptic number.

129243675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129243675 is a deficient number, since it is larger than the sum of its proper divisors (103866405).

129243675 is a wasteful number, since it uses less digits than its factorization.

129243675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156683 (or 156678 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 129243675 is about 11368.5388243169. The cubic root of 129243675 is about 505.5953831325.

The spelling of 129243675 in words is "one hundred twenty-nine million, two hundred forty-three thousand, six hundred seventy-five".