135439875 has 24 divisors (see below), whose sum is σ = 244154976. Its totient is φ = 72234000.

The previous prime is 135439859. The next prime is 135439877. The reversal of 135439875 is 578934531.

135439875 is a `hidden beast` number, since 13 + 543 + 98 + 7 + 5 = 666.

It is not a de Polignac number, because 135439875 - 2⁴ = 135439859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 135439875.

It is not an unprimeable number, because it can be changed into a prime (135439877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59071 + ... + 61320.

It is an arithmetic number, because the mean of its divisors is an integer number (10173124).

Almost surely, 2^135439875 is an apocalyptic number.

135439875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

135439875 is a deficient number, since it is larger than the sum of its proper divisors (108715101).

135439875 is a wasteful number, since it uses less digits than its factorization.

135439875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120412 (or 120399 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 135439875 is about 11637.8638503808. The cubic root of 135439875 is about 513.5493471132.

The spelling of 135439875 in words is "one hundred thirty-five million, four hundred thirty-nine thousand, eight hundred seventy-five".