133123542 has 16 divisors (see below), whose sum is σ = 266580480. Its totient is φ = 44318952.

The previous prime is 133123541. The next prime is 133123589. The reversal of 133123542 is 245321331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133123541) 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 7 ways as a sum of consecutive naturals, for example, 8542 + ... + 18417.

It is an arithmetic number, because the mean of its divisors is an integer number (16661280).

Almost surely, 2^133123542 is an apocalyptic number.

133123542 is an abundant number, since it is smaller than the sum of its proper divisors (133456938).

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

133123542 is a wasteful number, since it uses less digits than its factorization.

133123542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27787.

The product of its digits is 2160, while the sum is 24.

The square root of 133123542 is about 11537.9175764087. The cubic root of 133123542 is about 510.6048724805.

Adding to 133123542 its reverse (245321331), we get a palindrome (378444873).

The spelling of 133123542 in words is "one hundred thirty-three million, one hundred twenty-three thousand, five hundred forty-two".