135551725 has 12 divisors (see below), whose sum is σ = 168393364. Its totient is φ = 108241920.

The previous prime is 135551701. The next prime is 135551737. The reversal of 135551725 is 527155531.

It can be written as a sum of positive squares in 6 ways, for example, as 2910436 + 132641289 = 1706^2 + 11517^2 .

It is not a de Polignac number, because 135551725 - 2¹¹ = 135549677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9727 + ... + 19123.

Almost surely, 2^135551725 is an apocalyptic number.

It is an amenable number.

135551725 is a deficient number, since it is larger than the sum of its proper divisors (32841639).

135551725 is an equidigital number, since it uses as much as digits as its factorization.

135551725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9984 (or 9979 counting only the distinct ones).

The product of its digits is 26250, while the sum is 34.

The square root of 135551725 is about 11642.6682938234. The cubic root of 135551725 is about 513.6906759741.

The spelling of 135551725 in words is "one hundred thirty-five million, five hundred fifty-one thousand, seven hundred twenty-five".