133945 has 16 divisors (see below), whose sum is σ = 190080. Its totient is φ = 88704.

The previous prime is 133919. The next prime is 133949. The reversal of 133945 is 549331.

It is not a de Polignac number, because 133945 - 2¹³ = 125753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1461 + ... + 1549.

It is an arithmetic number, because the mean of its divisors is an integer number (11880).

2¹³³⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

133945 is a deficient number, since it is larger than the sum of its proper divisors (56135).

133945 is an equidigital number, since it uses as much as digits as its factorization.

133945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144.

The product of its digits is 1620, while the sum is 25.

The square root of 133945 is about 365.9849723691. The cubic root of 133945 is about 51.1652973258.

The spelling of 133945 in words is "one hundred thirty-three thousand, nine hundred forty-five".