133126542 has 12 divisors (see below), whose sum is σ = 288440880. Its totient is φ = 44375508.

The previous prime is 133126531. The next prime is 133126561. The reversal of 133126542 is 245621331.

133126542 is a `hidden beast` number, since 1 + 3 + 3 + 1 + 2 + 654 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3697942 + ... + 3697977.

It is an arithmetic number, because the mean of its divisors is an integer number (24036740).

Almost surely, 2^133126542 is an apocalyptic number.

133126542 is an abundant number, since it is smaller than the sum of its proper divisors (155314338).

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

133126542 is a wasteful number, since it uses less digits than its factorization.

133126542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7395927 (or 7395924 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 133126542 is about 11538.0475818052. The cubic root of 133126542 is about 510.6087080232.

Adding to 133126542 its reverse (245621331), we get a palindrome (378747873).

The spelling of 133126542 in words is "one hundred thirty-three million, one hundred twenty-six thousand, five hundred forty-two".