129570118 has 4 divisors (see below), whose sum is σ = 194355180. Its totient is φ = 64785058.

The previous prime is 129570113. The next prime is 129570121. The reversal of 129570118 is 811075921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129570113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32392528 + ... + 32392531.

It is an arithmetic number, because the mean of its divisors is an integer number (48588795).

Almost surely, 2^129570118 is an apocalyptic number.

129570118 is a deficient number, since it is larger than the sum of its proper divisors (64785062).

129570118 is an equidigital number, since it uses as much as digits as its factorization.

129570118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64785061.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 129570118 is about 11382.8870678752. The cubic root of 129570118 is about 506.0207019708.

The spelling of 129570118 in words is "one hundred twenty-nine million, five hundred seventy thousand, one hundred eighteen".