133242441 has 4 divisors (see below), whose sum is σ = 177656592. Its totient is φ = 88828292.

The previous prime is 133242437. The next prime is 133242449. The reversal of 133242441 is 144242331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133242441 - 2² = 133242437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133242449) 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, 22207071 + ... + 22207076.

It is an arithmetic number, because the mean of its divisors is an integer number (44414148).

Almost surely, 2^133242441 is an apocalyptic number.

It is an amenable number.

133242441 is a deficient number, since it is larger than the sum of its proper divisors (44414151).

133242441 is an equidigital number, since it uses as much as digits as its factorization.

133242441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44414150.

The product of its digits is 2304, while the sum is 24.

The square root of 133242441 is about 11543.0689593366. The cubic root of 133242441 is about 510.7568424534.

Adding to 133242441 its reverse (144242331), we get a palindrome (277484772).

The spelling of 133242441 in words is "one hundred thirty-three million, two hundred forty-two thousand, four hundred forty-one".