135171225 has 72 divisors (see below), whose sum is σ = 291320640. Its totient is φ = 58527360.

The previous prime is 135171221. The next prime is 135171251. The reversal of 135171225 is 522171531.

It is not a de Polignac number, because 135171225 - 2² = 135171221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135171221) 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 71 ways as a sum of consecutive naturals, for example, 27667 + ... + 32183.

It is an arithmetic number, because the mean of its divisors is an integer number (4046120).

Almost surely, 2^135171225 is an apocalyptic number.

135171225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135171225 is an abundant number, since it is smaller than the sum of its proper divisors (156149415).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135171225 is a wasteful number, since it uses less digits than its factorization.

135171225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4559 (or 4551 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 135171225 is about 11626.3160545377. The cubic root of 135171225 is about 513.2095743239.

The spelling of 135171225 in words is "one hundred thirty-five million, one hundred seventy-one thousand, two hundred twenty-five".