135881125 has 32 divisors (see below), whose sum is σ = 178693632. Its totient is φ = 102960000.

The previous prime is 135881117. The next prime is 135881129. The reversal of 135881125 is 521188531.

It is not a de Polignac number, because 135881125 - 2³ = 135881117 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135881129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 433969 + ... + 434281.

It is an arithmetic number, because the mean of its divisors is an integer number (5584176).

Almost surely, 2^135881125 is an apocalyptic number.

It is an amenable number.

135881125 is a deficient number, since it is larger than the sum of its proper divisors (42812507).

135881125 is a wasteful number, since it uses less digits than its factorization.

135881125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 492 counting only the distinct ones).

The product of its digits is 9600, while the sum is 34.

The square root of 135881125 is about 11656.8059518892. The cubic root of 135881125 is about 514.1064405827.

The spelling of 135881125 in words is "one hundred thirty-five million, eight hundred eighty-one thousand, one hundred twenty-five".