133345265 has 4 divisors (see below), whose sum is σ = 160014324. Its totient is φ = 106676208.

The previous prime is 133345253. The next prime is 133345309. The reversal of 133345265 is 562543331.

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 68574961 + 64770304 = 8281^2 + 8048^2 .

It is a cyclic number.

It is not a de Polignac number, because 133345265 - 2¹⁰ = 133344241 is a prime.

It is a Duffinian number.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 13334522 + ... + 13334531.

It is an arithmetic number, because the mean of its divisors is an integer number (40003581).

Almost surely, 2^133345265 is an apocalyptic number.

It is an amenable number.

133345265 is a deficient number, since it is larger than the sum of its proper divisors (26669059).

133345265 is an equidigital number, since it uses as much as digits as its factorization.

133345265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26669058.

The product of its digits is 32400, while the sum is 32.

The square root of 133345265 is about 11547.5220285566. The cubic root of 133345265 is about 510.8881933890. Note that the first 3 decimals are identical.

Adding to 133345265 its reverse (562543331), we get a palindrome (695888596).

The spelling of 133345265 in words is "one hundred thirty-three million, three hundred forty-five thousand, two hundred sixty-five".