133502605 has 4 divisors (see below), whose sum is σ = 160203132. Its totient is φ = 106802080.

The previous prime is 133502599. The next prime is 133502609. The reversal of 133502605 is 506205331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72131049 + 61371556 = 8493^2 + 7834^2 .

It is not a de Polignac number, because 133502605 - 2⁷ = 133502477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133502605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133502609) 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, 13350256 + ... + 13350265.

It is an arithmetic number, because the mean of its divisors is an integer number (40050783).

Almost surely, 2^133502605 is an apocalyptic number.

It is an amenable number.

133502605 is a deficient number, since it is larger than the sum of its proper divisors (26700527).

133502605 is an equidigital number, since it uses as much as digits as its factorization.

133502605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26700526.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 133502605 is about 11554.3327371164. The cubic root of 133502605 is about 511.0890542974.

Adding to 133502605 its reverse (506205331), we get a palindrome (639707936).

The spelling of 133502605 in words is "one hundred thirty-three million, five hundred two thousand, six hundred five".