135215125 has 8 divisors (see below), whose sum is σ = 168748632. Its totient is φ = 108172000.

The previous prime is 135215117. The next prime is 135215141. The reversal of 135215125 is 521512531.

It can be written as a sum of positive squares in 4 ways, for example, as 3837681 + 131377444 = 1959^2 + 11462^2 .

It is not a de Polignac number, because 135215125 - 2³ = 135215117 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135215125.

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, 540736 + ... + 540985.

It is an arithmetic number, because the mean of its divisors is an integer number (21093579).

Almost surely, 2^135215125 is an apocalyptic number.

It is an amenable number.

135215125 is a deficient number, since it is larger than the sum of its proper divisors (33533507).

135215125 is an equidigital number, since it uses as much as digits as its factorization.

135215125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081736 (or 1081726 counting only the distinct ones).

The product of its digits is 1500, while the sum is 25.

The square root of 135215125 is about 11628.2038595821. The cubic root of 135215125 is about 513.2651272266.

Adding to 135215125 its reverse (521512531), we get a palindrome (656727656).

The spelling of 135215125 in words is "one hundred thirty-five million, two hundred fifteen thousand, one hundred twenty-five".