133242143 has 4 divisors (see below), whose sum is σ = 136843320. Its totient is φ = 129640968.

The previous prime is 133242127. The next prime is 133242191. The reversal of 133242143 is 341242331.

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

It is a cyclic number.

It is not a de Polignac number, because 133242143 - 2⁴ = 133242127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133242643) 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, 1800533 + ... + 1800606.

It is an arithmetic number, because the mean of its divisors is an integer number (34210830).

Almost surely, 2^133242143 is an apocalyptic number.

133242143 is a deficient number, since it is larger than the sum of its proper divisors (3601177).

133242143 is an equidigital number, since it uses as much as digits as its factorization.

133242143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601176.

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

The square root of 133242143 is about 11543.0560511504. The cubic root of 133242143 is about 510.7564616797.

Adding to 133242143 its reverse (341242331), we get a palindrome (474484474).

The spelling of 133242143 in words is "one hundred thirty-three million, two hundred forty-two thousand, one hundred forty-three".