135966251 has 2 divisors, whose sum is σ = 135966252. Its totient is φ = 135966250.

The previous prime is 135966241. The next prime is 135966263. The reversal of 135966251 is 152669531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135966251 - 2¹⁰ = 135965227 is a prime.

It is not a weakly prime, because it can be changed into another prime (135966241) 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 as a sum of consecutive naturals, namely, 67983125 + 67983126.

It is an arithmetic number, because the mean of its divisors is an integer number (67983126).

Almost surely, 2^135966251 is an apocalyptic number.

135966251 is a deficient number, since it is larger than the sum of its proper divisors (1).

135966251 is an equidigital number, since it uses as much as digits as its factorization.

135966251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 38.

The square root of 135966251 is about 11660.4567234736. The cubic root of 135966251 is about 514.2137762878.

The spelling of 135966251 in words is "one hundred thirty-five million, nine hundred sixty-six thousand, two hundred fifty-one".