133501 has 4 divisors (see below), whose sum is σ = 141372. Its totient is φ = 125632.

The previous prime is 133499. The next prime is 133519. The reversal of 133501 is 105331.

133501 = 24² + 25² + ... + 74².

133501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44100 + 89401 = 210^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 133501 - 2¹ = 133499 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3910 + ... + 3943.

It is an arithmetic number, because the mean of its divisors is an integer number (35343).

2¹³³⁵⁰¹ is an apocalyptic number.

It is an amenable number.

133501 is a deficient number, since it is larger than the sum of its proper divisors (7871).

133501 is an equidigital number, since it uses as much as digits as its factorization.

133501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7870.

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 133501 is about 365.3778865777. The cubic root of 133501 is about 51.1087006145.

Adding to 133501 its reverse (105331), we get a palindrome (238832).

The spelling of 133501 in words is "one hundred thirty-three thousand, five hundred one".