133245565 has 4 divisors (see below), whose sum is σ = 159894684. Its totient is φ = 106596448.

The previous prime is 133245557. The next prime is 133245577. The reversal of 133245565 is 565542331.

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 24710841 + 108534724 = 4971^2 + 10418^2 .

It is a cyclic number.

It is not a de Polignac number, because 133245565 - 2³ = 133245557 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 133245565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13324552 + ... + 13324561.

It is an arithmetic number, because the mean of its divisors is an integer number (39973671).

Almost surely, 2^133245565 is an apocalyptic number.

It is an amenable number.

133245565 is a deficient number, since it is larger than the sum of its proper divisors (26649119).

133245565 is an equidigital number, since it uses as much as digits as its factorization.

133245565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26649118.

The product of its digits is 54000, while the sum is 34.

The square root of 133245565 is about 11543.2042778424. The cubic root of 133245565 is about 510.7608341543.

Adding to 133245565 its reverse (565542331), we get a palindrome (698787896).

The spelling of 133245565 in words is "one hundred thirty-three million, two hundred forty-five thousand, five hundred sixty-five".