135241251 has 8 divisors (see below), whose sum is σ = 186138624. Its totient is φ = 87252360.

The previous prime is 135241243. The next prime is 135241283. The reversal of 135241251 is 152142531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135241251 - 2³ = 135241243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135241201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727011 + ... + 727196.

It is an arithmetic number, because the mean of its divisors is an integer number (23267328).

Almost surely, 2^135241251 is an apocalyptic number.

135241251 is a deficient number, since it is larger than the sum of its proper divisors (50897373).

135241251 is a wasteful number, since it uses less digits than its factorization.

135241251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454241.

The product of its digits is 1200, while the sum is 24.

The square root of 135241251 is about 11629.3271946403. The cubic root of 135241251 is about 513.2981824565.

Adding to 135241251 its reverse (152142531), we get a palindrome (287383782).

The spelling of 135241251 in words is "one hundred thirty-five million, two hundred forty-one thousand, two hundred fifty-one".