133007242 has 4 divisors (see below), whose sum is σ = 199510866. Its totient is φ = 66503620.

The previous prime is 133007233. The next prime is 133007249. The reversal of 133007242 is 242700331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242700331 = 67 ⋅3622393.

It can be written as a sum of positive squares in only one way, i.e., 132917841 + 89401 = 11529^2 + 299^2 .

It is not an unprimeable number, because it can be changed into a prime (133007249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33251809 + ... + 33251812.

Almost surely, 2^133007242 is an apocalyptic number.

133007242 is a deficient number, since it is larger than the sum of its proper divisors (66503624).

133007242 is an equidigital number, since it uses as much as digits as its factorization.

133007242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66503623.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 133007242 is about 11532.8765709167. The cubic root of 133007242 is about 510.4561368346.

Adding to 133007242 its reverse (242700331), we get a palindrome (375707573).

The spelling of 133007242 in words is "one hundred thirty-three million, seven thousand, two hundred forty-two".