135707251 has 2 divisors, whose sum is σ = 135707252. Its totient is φ = 135707250.

The previous prime is 135707233. The next prime is 135707261. The reversal of 135707251 is 152707531.

135707251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135707251 - 2⁷ = 135707123 is a prime.

It is not a weakly prime, because it can be changed into another prime (135707261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67853625 + 67853626.

It is an arithmetic number, because the mean of its divisors is an integer number (67853626).

Almost surely, 2^135707251 is an apocalyptic number.

135707251 is a deficient number, since it is larger than the sum of its proper divisors (1).

135707251 is an equidigital number, since it uses as much as digits as its factorization.

135707251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 135707251 is about 11649.3455180967. The cubic root of 135707251 is about 513.8870628038.

The spelling of 135707251 in words is "one hundred thirty-five million, seven hundred seven thousand, two hundred fifty-one".