129845138 has 8 divisors (see below), whose sum is σ = 195526332. Its totient is φ = 64669696.

The previous prime is 129845137. The next prime is 129845141. The reversal of 129845138 is 831548921.

It can be written as a sum of positive squares in 2 ways, for example, as 128890609 + 954529 = 11353^2 + 977^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 129845095 and 129845104.

It is not an unprimeable number, because it can be changed into a prime (129845137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125795 + ... + 126822.

Almost surely, 2^129845138 is an apocalyptic number.

129845138 is a deficient number, since it is larger than the sum of its proper divisors (65681194).

129845138 is a wasteful number, since it uses less digits than its factorization.

129845138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252876.

The product of its digits is 69120, while the sum is 41.

The square root of 129845138 is about 11394.9610793543. The cubic root of 129845138 is about 506.3784682755.

The spelling of 129845138 in words is "one hundred twenty-nine million, eight hundred forty-five thousand, one hundred thirty-eight".