133020342 has 144 divisors (see below), whose sum is σ = 378155232. Its totient is φ = 32901120.

The previous prime is 133020341. The next prime is 133020347. The reversal of 133020342 is 243020331.

It is a super-2 number, since 2×133020342² = 35388822771593928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133020341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 473242 + ... + 473522.

It is an arithmetic number, because the mean of its divisors is an integer number (2626078).

Almost surely, 2^133020342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133020342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189077616).

133020342 is an abundant number, since it is smaller than the sum of its proper divisors (245134890).

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

133020342 is a wasteful number, since it uses less digits than its factorization.

133020342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 133020342 is about 11533.4444985009. Note that the first 4 decimals coincide. The cubic root of 133020342 is about 510.4728947088.

Adding to 133020342 its reverse (243020331), we get a palindrome (376040673).

The spelling of 133020342 in words is "one hundred thirty-three million, twenty thousand, three hundred forty-two".