133012645 has 4 divisors (see below), whose sum is σ = 159615180. Its totient is φ = 106410112.

The previous prime is 133012637. The next prime is 133012667. The reversal of 133012645 is 546210331.

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 92486689 + 40525956 = 9617^2 + 6366^2 .

It is a cyclic number.

It is not a de Polignac number, because 133012645 - 2³ = 133012637 is a prime.

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, 13301260 + ... + 13301269.

It is an arithmetic number, because the mean of its divisors is an integer number (39903795).

Almost surely, 2^133012645 is an apocalyptic number.

It is an amenable number.

133012645 is a deficient number, since it is larger than the sum of its proper divisors (26602535).

133012645 is an equidigital number, since it uses as much as digits as its factorization.

133012645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26602534.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 133012645 is about 11533.1108119189. The cubic root of 133012645 is about 510.4630486316.

Adding to 133012645 its reverse (546210331), we get a palindrome (679222976).

The spelling of 133012645 in words is "one hundred thirty-three million, twelve thousand, six hundred forty-five".