135890 has 16 divisors (see below), whose sum is σ = 248832. Its totient is φ = 53424.

The previous prime is 135887. The next prime is 135893. The reversal of 135890 is 98531.

It is an interprime number because it is at equal distance from previous prime (135887) and next prime (135893).

It is not an unprimeable number, because it can be changed into a prime (135893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (15552).

2¹³⁵⁸⁹⁰ is an apocalyptic number.

135890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135890 is a deficient number, since it is larger than the sum of its proper divisors (112942).

135890 is a wasteful number, since it uses less digits than its factorization.

135890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 135890 is about 368.6326084328. The cubic root of 135890 is about 51.4117633198.

The spelling of 135890 in words is "one hundred thirty-five thousand, eight hundred ninety".