135579 has 8 divisors (see below), whose sum is σ = 185152. Its totient is φ = 88200.

The previous prime is 135571. The next prime is 135581. The reversal of 135579 is 975531.

It is a happy number.

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

It is not a de Polignac number, because 135579 - 2³ = 135571 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (135571) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397 + ... + 654.

It is an arithmetic number, because the mean of its divisors is an integer number (23144).

2¹³⁵⁵⁷⁹ is an apocalyptic number.

135579 is a deficient number, since it is larger than the sum of its proper divisors (49573).

135579 is a wasteful number, since it uses less digits than its factorization.

135579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097.

The product of its digits is 4725, while the sum is 30.

The square root of 135579 is about 368.2105376004. The cubic root of 135579 is about 51.3725127702.

It can be divided in two parts, 13 and 5579, that multiplied together give a palindrome (72527).

The spelling of 135579 in words is "one hundred thirty-five thousand, five hundred seventy-nine".