135019565 has 4 divisors (see below), whose sum is σ = 162023484. Its totient is φ = 108015648.

The previous prime is 135019561. The next prime is 135019589. The reversal of 135019565 is 565910531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565910531 = 103 ⋅5494277.

It can be written as a sum of positive squares in 2 ways, for example, as 13557124 + 121462441 = 3682^2 + 11021^2 .

It is a cyclic number.

It is not a de Polignac number, because 135019565 - 2² = 135019561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135019561) 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 3 ways as a sum of consecutive naturals, for example, 13501952 + ... + 13501961.

It is an arithmetic number, because the mean of its divisors is an integer number (40505871).

Almost surely, 2^135019565 is an apocalyptic number.

It is an amenable number.

135019565 is a deficient number, since it is larger than the sum of its proper divisors (27003919).

135019565 is an equidigital number, since it uses as much as digits as its factorization.

135019565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27003918.

The product of its (nonzero) digits is 20250, while the sum is 35.

The square root of 135019565 is about 11619.7919516659. The cubic root of 135019565 is about 513.0175647907.

The spelling of 135019565 in words is "one hundred thirty-five million, nineteen thousand, five hundred sixty-five".