135569 has 8 divisors (see below), whose sum is σ = 157248. Its totient is φ = 114480.

The previous prime is 135559. The next prime is 135571. The reversal of 135569 is 965531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135569 is a prime.

It is a super-2 number, since 2×135569² = 36757907522, which contains 22 as substring.

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (135559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659 + ... + 839.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2¹³⁵⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

135569 is a deficient number, since it is larger than the sum of its proper divisors (21679).

135569 is a wasteful number, since it uses less digits than its factorization.

135569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295.

The product of its digits is 4050, while the sum is 29.

The square root of 135569 is about 368.1969581623. The cubic root of 135569 is about 51.3712496991.

The spelling of 135569 in words is "one hundred thirty-five thousand, five hundred sixty-nine".