133125665 has 16 divisors (see below), whose sum is σ = 164851200. Its totient is φ = 103152192.

The previous prime is 133125661. The next prime is 133125697. The reversal of 133125665 is 566521331.

It is a cyclic number.

It is not a de Polignac number, because 133125665 - 2² = 133125661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133125661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17756 + ... + 24114.

It is an arithmetic number, because the mean of its divisors is an integer number (10303200).

Almost surely, 2^133125665 is an apocalyptic number.

It is an amenable number.

133125665 is a deficient number, since it is larger than the sum of its proper divisors (31725535).

133125665 is an equidigital number, since it uses as much as digits as its factorization.

133125665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6496.

The product of its digits is 16200, while the sum is 32.

The square root of 133125665 is about 11538.0095770458. The cubic root of 133125665 is about 510.6075867722.

Adding to 133125665 its reverse (566521331), we get a palindrome (699646996).

The spelling of 133125665 in words is "one hundred thirty-three million, one hundred twenty-five thousand, six hundred sixty-five".