133526 has 4 divisors (see below), whose sum is σ = 200292. Its totient is φ = 66762.

The previous prime is 133519. The next prime is 133541. The reversal of 133526 is 625331.

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

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 133498 and 133507.

It is a congruent 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 as a sum of consecutive naturals, namely, 33380 + ... + 33383.

It is an arithmetic number, because the mean of its divisors is an integer number (50073).

2¹³³⁵²⁶ is an apocalyptic number.

133526 is a deficient number, since it is larger than the sum of its proper divisors (66766).

133526 is an equidigital number, since it uses as much as digits as its factorization.

133526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66765.

The product of its digits is 540, while the sum is 20.

The square root of 133526 is about 365.4120961326. The cubic root of 133526 is about 51.1118906973. Note that the first 3 decimals are identical.

Adding to 133526 its reverse (625331), we get a palindrome (758857).

The spelling of 133526 in words is "one hundred thirty-three thousand, five hundred twenty-six".