134121209 has 8 divisors (see below), whose sum is σ = 144624480. Its totient is φ = 123962400.

The previous prime is 134121199. The next prime is 134121227. The reversal of 134121209 is 902121431.

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

It is a cyclic number.

It is not a de Polignac number, because 134121209 - 2⁴ = 134121193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134121269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85307 + ... + 86864.

It is an arithmetic number, because the mean of its divisors is an integer number (18078060).

Almost surely, 2^134121209 is an apocalyptic number.

134121209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

134121209 is a deficient number, since it is larger than the sum of its proper divisors (10503271).

134121209 is a wasteful number, since it uses less digits than its factorization.

134121209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172231.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 134121209 is about 11581.0711508047. The cubic root of 134121209 is about 511.8772403137.

The spelling of 134121209 in words is "one hundred thirty-four million, one hundred twenty-one thousand, two hundred nine".