135252405 has 12 divisors (see below), whose sum is σ = 234437580. Its totient is φ = 72134592.

The previous prime is 135252389. The next prime is 135252407. The reversal of 135252405 is 504252531.

It is a happy number.

135252405 is a `hidden beast` number, since 1 + 3 + 5 + 252 + 405 = 666.

135252405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19000881 + 116251524 = 4359^2 + 10782^2 .

It is not a de Polignac number, because 135252405 - 2⁴ = 135252389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135252407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1502760 + ... + 1502849.

It is an arithmetic number, because the mean of its divisors is an integer number (19536465).

Almost surely, 2^135252405 is an apocalyptic number.

135252405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135252405 is a deficient number, since it is larger than the sum of its proper divisors (99185175).

135252405 is a wasteful number, since it uses less digits than its factorization.

135252405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005620 (or 3005617 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 135252405 is about 11629.8067481794. The cubic root of 135252405 is about 513.3122934631.

The spelling of 135252405 in words is "one hundred thirty-five million, two hundred fifty-two thousand, four hundred five".