135021225 has 24 divisors (see below), whose sum is σ = 236368800. Its totient is φ = 67774720.

The previous prime is 135021223. The next prime is 135021269. The reversal of 135021225 is 522120531.

It is not a de Polignac number, because 135021225 - 2¹ = 135021223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135021223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51675 + ... + 54224.

It is an arithmetic number, because the mean of its divisors is an integer number (9848700).

Almost surely, 2^135021225 is an apocalyptic number.

135021225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135021225 is a deficient number, since it is larger than the sum of its proper divisors (101347575).

135021225 is a wasteful number, since it uses less digits than its factorization.

135021225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105929 (or 105924 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 135021225 is about 11619.8633812967. The cubic root of 135021225 is about 513.0196672160.

Adding to 135021225 its reverse (522120531), we get a palindrome (657141756).

The spelling of 135021225 in words is "one hundred thirty-five million, twenty-one thousand, two hundred twenty-five".