133542507 has 16 divisors (see below), whose sum is σ = 214204160. Its totient is φ = 72293472.

The previous prime is 133542499. The next prime is 133542517. The reversal of 133542507 is 705245331.

It is not a de Polignac number, because 133542507 - 2³ = 133542499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133542517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166948 + ... + 167745.

It is an arithmetic number, because the mean of its divisors is an integer number (13387760).

Almost surely, 2^133542507 is an apocalyptic number.

133542507 is a deficient number, since it is larger than the sum of its proper divisors (80661653).

133542507 is a wasteful number, since it uses less digits than its factorization.

133542507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334722.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 133542507 is about 11556.0593196816. The cubic root of 133542507 is about 511.1399682702.

Adding to 133542507 its reverse (705245331), we get a palindrome (838787838).

The spelling of 133542507 in words is "one hundred thirty-three million, five hundred forty-two thousand, five hundred seven".