133137145 has 4 divisors (see below), whose sum is σ = 159764580. Its totient is φ = 106509712.

The previous prime is 133137143. The next prime is 133137163. The reversal of 133137145 is 541731331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541731331 = 229 ⋅2365639.

It can be written as a sum of positive squares in 2 ways, for example, as 14348944 + 118788201 = 3788^2 + 10899^2 .

It is a cyclic number.

It is not a de Polignac number, because 133137145 - 2¹ = 133137143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133137143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13313710 + ... + 13313719.

It is an arithmetic number, because the mean of its divisors is an integer number (39941145).

Almost surely, 2^133137145 is an apocalyptic number.

It is an amenable number.

133137145 is a deficient number, since it is larger than the sum of its proper divisors (26627435).

133137145 is an equidigital number, since it uses as much as digits as its factorization.

133137145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26627434.

The product of its digits is 3780, while the sum is 28.

The square root of 133137145 is about 11538.5070524743. The cubic root of 133137145 is about 510.6222636481.

Adding to 133137145 its reverse (541731331), we get a palindrome (674868476).

The spelling of 133137145 in words is "one hundred thirty-three million, one hundred thirty-seven thousand, one hundred forty-five".