135421420 has 12 divisors (see below), whose sum is σ = 284385024. Its totient is φ = 54168560.

The previous prime is 135421411. The next prime is 135421441. The reversal of 135421420 is 24124531.

It is a junction number, because it is equal to n+sod(n) for n = 135421391 and 135421400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385516 + ... + 3385555.

It is an arithmetic number, because the mean of its divisors is an integer number (23698752).

Almost surely, 2^135421420 is an apocalyptic number.

135421420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135421420 is an abundant number, since it is smaller than the sum of its proper divisors (148963604).

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

135421420 is a wasteful number, since it uses less digits than its factorization.

135421420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771080 (or 6771078 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 135421420 is about 11637.0709373106. The cubic root of 135421420 is about 513.5260206896.

Adding to 135421420 its reverse (24124531), we get a palindrome (159545951).

The spelling of 135421420 in words is "one hundred thirty-five million, four hundred twenty-one thousand, four hundred twenty".