133524121 has 4 divisors (see below), whose sum is σ = 134846244. Its totient is φ = 132202000.

The previous prime is 133524101. The next prime is 133524163. The reversal of 133524121 is 121425331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121425331 = 101 ⋅1202231.

It can be written as a sum of positive squares in 2 ways, for example, as 95824521 + 37699600 = 9789^2 + 6140^2 .

It is a cyclic number.

It is not a de Polignac number, because 133524121 - 2¹¹ = 133522073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133524092 and 133524101.

It is not an unprimeable number, because it can be changed into a prime (133524101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660910 + ... + 661111.

It is an arithmetic number, because the mean of its divisors is an integer number (33711561).

Almost surely, 2^133524121 is an apocalyptic number.

It is an amenable number.

133524121 is a deficient number, since it is larger than the sum of its proper divisors (1322123).

133524121 is a wasteful number, since it uses less digits than its factorization.

133524121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322122.

The product of its digits is 720, while the sum is 22.

The square root of 133524121 is about 11555.2637789018. The cubic root of 133524121 is about 511.1165094455.

Adding to 133524121 its reverse (121425331), we get a palindrome (254949452).

The spelling of 133524121 in words is "one hundred thirty-three million, five hundred twenty-four thousand, one hundred twenty-one".