133456161 has 8 divisors (see below), whose sum is σ = 180597664. Its totient is φ = 87642720.

The previous prime is 133456159. The next prime is 133456177. The reversal of 133456161 is 161654331.

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

It is not a de Polignac number, because 133456161 - 2¹ = 133456159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133456111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331780 + ... + 332181.

It is an arithmetic number, because the mean of its divisors is an integer number (22574708).

Almost surely, 2^133456161 is an apocalyptic number.

It is an amenable number.

133456161 is a deficient number, since it is larger than the sum of its proper divisors (47141503).

133456161 is an equidigital number, since it uses as much as digits as its factorization.

133456161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664031.

The product of its digits is 6480, while the sum is 30.

The square root of 133456161 is about 11552.3227534553. The cubic root of 133456161 is about 511.0297801153.

The spelling of 133456161 in words is "one hundred thirty-three million, four hundred fifty-six thousand, one hundred sixty-one".