135599020 has 12 divisors (see below), whose sum is σ = 284757984. Its totient is φ = 54239600.

The previous prime is 135599011. The next prime is 135599047. The reversal of 135599020 is 20995531.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3389956 + ... + 3389995.

It is an arithmetic number, because the mean of its divisors is an integer number (23729832).

Almost surely, 2^135599020 is an apocalyptic number.

135599020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135599020 is an abundant number, since it is smaller than the sum of its proper divisors (149158964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135599020 is a wasteful number, since it uses less digits than its factorization.

135599020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779960 (or 6779958 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 135599020 is about 11644.6992232518. The cubic root of 135599020 is about 513.7504125199.

The spelling of 135599020 in words is "one hundred thirty-five million, five hundred ninety-nine thousand, twenty".