135124220 has 48 divisors (see below), whose sum is σ = 353783808. Its totient is φ = 42116160.

The previous prime is 135124183. The next prime is 135124307. The reversal of 135124220 is 22421531.

135124220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 135124192 and 135124201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42332 + ... + 45411.

It is an arithmetic number, because the mean of its divisors is an integer number (7370496).

Almost surely, 2^135124220 is an apocalyptic number.

135124220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135124220 is an abundant number, since it is smaller than the sum of its proper divisors (218659588).

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

135124220 is a wasteful number, since it uses less digits than its factorization.

135124220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87770 (or 87768 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 135124220 is about 11624.2943871876. The cubic root of 135124220 is about 513.1500788881.

Adding to 135124220 its reverse (22421531), we get a palindrome (157545751).

The spelling of 135124220 in words is "one hundred thirty-five million, one hundred twenty-four thousand, two hundred twenty".