133465 has 4 divisors (see below), whose sum is σ = 160164. Its totient is φ = 106768.

The previous prime is 133451. The next prime is 133481. The reversal of 133465 is 564331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564331 = 379 ⋅1489.

It can be written as a sum of positive squares in 2 ways, for example, as 15129 + 118336 = 123^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 133465 - 2⁷ = 133337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13342 + ... + 13351.

It is an arithmetic number, because the mean of its divisors is an integer number (40041).

2¹³³⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

133465 is a deficient number, since it is larger than the sum of its proper divisors (26699).

133465 is an equidigital number, since it uses as much as digits as its factorization.

133465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26698.

The product of its digits is 1080, while the sum is 22.

The square root of 133465 is about 365.3286191910. The cubic root of 133465 is about 51.1041061954.

Adding to 133465 its reverse (564331), we get a palindrome (697796).

The spelling of 133465 in words is "one hundred thirty-three thousand, four hundred sixty-five".