135906725 has 6 divisors (see below), whose sum is σ = 168524370. Its totient is φ = 108725360.

The previous prime is 135906707. The next prime is 135906761. The reversal of 135906725 is 527609531.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2411809 + 133494916 = 1553^2 + 11554^2 .

It is not a de Polignac number, because 135906725 - 2²⁴ = 119129509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2718110 + ... + 2718159.

It is an arithmetic number, because the mean of its divisors is an integer number (28087395).

Almost surely, 2^135906725 is an apocalyptic number.

It is an amenable number.

135906725 is a deficient number, since it is larger than the sum of its proper divisors (32617645).

135906725 is an equidigital number, since it uses as much as digits as its factorization.

135906725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436279 (or 5436274 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 135906725 is about 11657.9039711262. The cubic root of 135906725 is about 514.1387244348.

It can be divided in two parts, 135906 and 725, that added together give a palindrome (136631).

The spelling of 135906725 in words is "one hundred thirty-five million, nine hundred six thousand, seven hundred twenty-five".