133505725 has 6 divisors (see below), whose sum is σ = 165547130. Its totient is φ = 106804560.

The previous prime is 133505689. The next prime is 133505767. The reversal of 133505725 is 527505331.

It can be written as a sum of positive squares in 3 ways, for example, as 21548164 + 111957561 = 4642^2 + 10581^2 .

It is not a de Polignac number, because 133505725 - 2¹¹ = 133503677 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 5 ways as a sum of consecutive naturals, for example, 2670090 + ... + 2670139.

Almost surely, 2^133505725 is an apocalyptic number.

It is an amenable number.

133505725 is a deficient number, since it is larger than the sum of its proper divisors (32041405).

133505725 is an equidigital number, since it uses as much as digits as its factorization.

133505725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340239 (or 5340234 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 133505725 is about 11554.4677506149. The cubic root of 133505725 is about 511.0930357064.

The spelling of 133505725 in words is "one hundred thirty-three million, five hundred five thousand, seven hundred twenty-five".