135420269 has 2 divisors, whose sum is σ = 135420270. Its totient is φ = 135420268.

The previous prime is 135420223. The next prime is 135420319. The reversal of 135420269 is 962024531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129095044 + 6325225 = 11362^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 135420269 - 2⁸ = 135420013 is a prime.

It is a super-2 number, since 2×135420269² = 36677298512064722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135420209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67710134 + 67710135.

It is an arithmetic number, because the mean of its divisors is an integer number (67710135).

Almost surely, 2^135420269 is an apocalyptic number.

It is an amenable number.

135420269 is a deficient number, since it is larger than the sum of its proper divisors (1).

135420269 is an equidigital number, since it uses as much as digits as its factorization.

135420269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 135420269 is about 11637.0214831803. The cubic root of 135420269 is about 513.5245657988.

The spelling of 135420269 in words is "one hundred thirty-five million, four hundred twenty thousand, two hundred sixty-nine".