133241243 has 4 divisors (see below), whose sum is σ = 140253960. Its totient is φ = 126228528.

The previous prime is 133241221. The next prime is 133241261. The reversal of 133241243 is 342142331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342142331 = 1657 ⋅206483.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133241243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133241443) 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, 3506330 + ... + 3506367.

It is an arithmetic number, because the mean of its divisors is an integer number (35063490).

Almost surely, 2^133241243 is an apocalyptic number.

133241243 is a deficient number, since it is larger than the sum of its proper divisors (7012717).

133241243 is an equidigital number, since it uses as much as digits as its factorization.

133241243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012716.

The product of its digits is 1728, while the sum is 23.

The square root of 133241243 is about 11543.0170666078. The cubic root of 133241243 is about 510.7553116886.

Adding to 133241243 its reverse (342142331), we get a palindrome (475383574).

The spelling of 133241243 in words is "one hundred thirty-three million, two hundred forty-one thousand, two hundred forty-three".