135860239 has 4 divisors (see below), whose sum is σ = 137062656. Its totient is φ = 134657824.

The previous prime is 135860173. The next prime is 135860261. The reversal of 135860239 is 932068531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135860239 - 2⁷ = 135860111 is a prime.

It is a super-2 number, since 2×135860239² = 36916009082274242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135860198 and 135860207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135860269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601039 + ... + 601264.

It is an arithmetic number, because the mean of its divisors is an integer number (34265664).

Almost surely, 2^135860239 is an apocalyptic number.

135860239 is a deficient number, since it is larger than the sum of its proper divisors (1202417).

135860239 is a wasteful number, since it uses less digits than its factorization.

135860239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202416.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 135860239 is about 11655.9100459810. The cubic root of 135860239 is about 514.0800984955.

The spelling of 135860239 in words is "one hundred thirty-five million, eight hundred sixty thousand, two hundred thirty-nine".