135431125 has 8 divisors (see below), whose sum is σ = 169018200. Its totient is φ = 108344800.

The previous prime is 135431113. The next prime is 135431141. The reversal of 135431125 is 521134531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2582449 + 132848676 = 1607^2 + 11526^2 .

It is a de Polignac number, because none of the positive numbers 2^k-135431125 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 135431125.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 541600 + ... + 541849.

It is an arithmetic number, because the mean of its divisors is an integer number (21127275).

Almost surely, 2^135431125 is an apocalyptic number.

It is an amenable number.

135431125 is a deficient number, since it is larger than the sum of its proper divisors (33587075).

135431125 is an equidigital number, since it uses as much as digits as its factorization.

135431125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083464 (or 1083454 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 135431125 is about 11637.4879162128. The cubic root of 135431125 is about 513.5382877076.

Adding to 135431125 its reverse (521134531), we get a palindrome (656565656).

The spelling of 135431125 in words is "one hundred thirty-five million, four hundred thirty-one thousand, one hundred twenty-five".