133481 has 2 divisors, whose sum is σ = 133482. Its totient is φ = 133480.

The previous prime is 133451. The next prime is 133493. The reversal of 133481 is 184331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133225 + 256 = 365^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 133481 - 2⁶ = 133417 is a prime.

It is a super-2 number, since 2×133481² = 35634354722, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 133481.

It is not a weakly prime, because it can be changed into another prime (133451) by changing a digit.

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 as a sum of consecutive naturals, namely, 66740 + 66741.

It is an arithmetic number, because the mean of its divisors is an integer number (66741).

2¹³³⁴⁸¹ is an apocalyptic number.

It is an amenable number.

133481 is a deficient number, since it is larger than the sum of its proper divisors (1).

133481 is an equidigital number, since it uses as much as digits as its factorization.

133481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 133481 is about 365.3505166275. The cubic root of 133481 is about 51.1061482614.

The spelling of 133481 in words is "one hundred thirty-three thousand, four hundred eighty-one".