133685745 has 8 divisors (see below), whose sum is σ = 213897216. Its totient is φ = 71299056.

The previous prime is 133685723. The next prime is 133685749. The reversal of 133685745 is 547586331.

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

It is not a de Polignac number, because 133685745 - 2¹⁸ = 133423601 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133685697 and 133685706.

It is not an unprimeable number, because it can be changed into a prime (133685749) 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, 4456177 + ... + 4456206.

It is an arithmetic number, because the mean of its divisors is an integer number (26737152).

Almost surely, 2^133685745 is an apocalyptic number.

133685745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133685745 is a deficient number, since it is larger than the sum of its proper divisors (80211471).

133685745 is an equidigital number, since it uses as much as digits as its factorization.

133685745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8912391.

The product of its digits is 302400, while the sum is 42.

The square root of 133685745 is about 11562.2551865975. The cubic root of 133685745 is about 511.3226529381.

The spelling of 133685745 in words is "one hundred thirty-three million, six hundred eighty-five thousand, seven hundred forty-five".