133420242 has 32 divisors (see below), whose sum is σ = 290577600. Its totient is φ = 40678848.

The previous prime is 133420241. The next prime is 133420253. The reversal of 133420242 is 242024331.

It is not an unprimeable number, because it can be changed into a prime (133420241) 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 15 ways as a sum of consecutive naturals, for example, 16873 + ... + 23484.

It is an arithmetic number, because the mean of its divisors is an integer number (9080550).

Almost surely, 2^133420242 is an apocalyptic number.

133420242 is an abundant number, since it is smaller than the sum of its proper divisors (157157358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133420242 is a wasteful number, since it uses less digits than its factorization.

133420242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40410.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 133420242 is about 11550.7680264128. The cubic root of 133420242 is about 510.9839290394.

Adding to 133420242 its reverse (242024331), we get a palindrome (375444573).

The spelling of 133420242 in words is "one hundred thirty-three million, four hundred twenty thousand, two hundred forty-two".