135252249 has 16 divisors (see below), whose sum is σ = 200067840. Its totient is φ = 80580560.

The previous prime is 135252233. The next prime is 135252263. The reversal of 135252249 is 942252531.

It is a cyclic number.

It is not a de Polignac number, because 135252249 - 2⁴ = 135252233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135252749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32787 + ... + 36680.

It is an arithmetic number, because the mean of its divisors is an integer number (12504240).

Almost surely, 2^135252249 is an apocalyptic number.

It is an amenable number.

135252249 is a deficient number, since it is larger than the sum of its proper divisors (64815591).

135252249 is a wasteful number, since it uses less digits than its factorization.

135252249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69540.

The product of its digits is 21600, while the sum is 33.

The square root of 135252249 is about 11629.8000412733. The cubic root of 135252249 is about 513.3120961117.

The spelling of 135252249 in words is "one hundred thirty-five million, two hundred fifty-two thousand, two hundred forty-nine".