135400225 has 6 divisors (see below), whose sum is σ = 167896310. Its totient is φ = 108320160.

The previous prime is 135400207. The next prime is 135400229. The reversal of 135400225 is 522004531.

It can be written as a sum of positive squares in 3 ways, for example, as 5234944 + 130165281 = 2288^2 + 11409^2 .

It is not a de Polignac number, because 135400225 - 2¹¹ = 135398177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135400196 and 135400205.

It is not an unprimeable number, because it can be changed into a prime (135400229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2707980 + ... + 2708029.

Almost surely, 2^135400225 is an apocalyptic number.

It is an amenable number.

135400225 is a deficient number, since it is larger than the sum of its proper divisors (32496085).

135400225 is an equidigital number, since it uses as much as digits as its factorization.

135400225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5416019 (or 5416014 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 135400225 is about 11636.1602343728. The cubic root of 135400225 is about 513.4992283946.

Adding to 135400225 its reverse (522004531), we get a palindrome (657404756).

The spelling of 135400225 in words is "one hundred thirty-five million, four hundred thousand, two hundred twenty-five".