135612225 has 84 divisors (see below), whose sum is σ = 288412096. Its totient is φ = 61935840.

The previous prime is 135612223. The next prime is 135612227. The reversal of 135612225 is 522216531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (135612223) and next prime (135612227).

It is not a de Polignac number, because 135612225 - 2¹ = 135612223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (135612223) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 127044 + ... + 128106.

Almost surely, 2^135612225 is an apocalyptic number.

135612225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135612225 is an abundant number, since it is smaller than the sum of its proper divisors (152799871).

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

135612225 is an equidigital number, since it uses as much as digits as its factorization.

135612225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1078 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 135612225 is about 11645.2662056305. The cubic root of 135612225 is about 513.7670887810.

Adding to 135612225 its reverse (522216531), we get a palindrome (657828756).

The spelling of 135612225 in words is "one hundred thirty-five million, six hundred twelve thousand, two hundred twenty-five".