133043542 has 4 divisors (see below), whose sum is σ = 199565316. Its totient is φ = 66521770.

The previous prime is 133043539. The next prime is 133043543. The reversal of 133043542 is 245340331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245340331 = 19 ⋅12912649.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133043543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33260884 + ... + 33260887.

It is an arithmetic number, because the mean of its divisors is an integer number (49891329).

Almost surely, 2^133043542 is an apocalyptic number.

133043542 is a deficient number, since it is larger than the sum of its proper divisors (66521774).

133043542 is an equidigital number, since it uses as much as digits as its factorization.

133043542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66521773.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 133043542 is about 11534.4502253033. The cubic root of 133043542 is about 510.5025700766.

Adding to 133043542 its reverse (245340331), we get a palindrome (378383873).

The spelling of 133043542 in words is "one hundred thirty-three million, forty-three thousand, five hundred forty-two".