133145438 has 12 divisors (see below), whose sum is σ = 206845080. Its totient is φ = 64276296.

The previous prime is 133145423. The next prime is 133145449. The reversal of 133145438 is 834541331.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 37898 + ... + 41261.

It is an arithmetic number, because the mean of its divisors is an integer number (17237090).

Almost surely, 2^133145438 is an apocalyptic number.

133145438 is a deficient number, since it is larger than the sum of its proper divisors (73699642).

133145438 is an equidigital number, since it uses as much as digits as its factorization.

133145438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79219 (or 79190 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 133145438 is about 11538.8664087942. The cubic root of 133145438 is about 510.6328655041.

Adding to 133145438 its reverse (834541331), we get a palindrome (967686769).

The spelling of 133145438 in words is "one hundred thirty-three million, one hundred forty-five thousand, four hundred thirty-eight".