135015251 has 16 divisors (see below), whose sum is σ = 157194240. Its totient is φ = 113572800.

The previous prime is 135015247. The next prime is 135015253. The reversal of 135015251 is 152510531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 135015251 - 2² = 135015247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135015253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224351 + ... + 224951.

It is an arithmetic number, because the mean of its divisors is an integer number (9824640).

Almost surely, 2^135015251 is an apocalyptic number.

135015251 is a deficient number, since it is larger than the sum of its proper divisors (22178989).

135015251 is an equidigital number, since it uses as much as digits as its factorization.

135015251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 135015251 is about 11619.6063186323. The cubic root of 135015251 is about 513.0121009372.

Adding to 135015251 its reverse (152510531), we get a palindrome (287525782).

The spelling of 135015251 in words is "one hundred thirty-five million, fifteen thousand, two hundred fifty-one".