135421 has 8 divisors (see below), whose sum is σ = 159264. Its totient is φ = 113520.

The previous prime is 135409. The next prime is 135427. The reversal of 135421 is 124531.

135421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135421 - 2⁵ = 135389 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 135395 and 135404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331 + ... + 616.

It is an arithmetic number, because the mean of its divisors is an integer number (19908).

2¹³⁵⁴²¹ is an apocalyptic number.

135421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135421 is a deficient number, since it is larger than the sum of its proper divisors (23843).

135421 is a wasteful number, since it uses less digits than its factorization.

135421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its digits is 120, while the sum is 16.

The square root of 135421 is about 367.9959238905. The cubic root of 135421 is about 51.3525489801.

Adding to 135421 its reverse (124531), we get a palindrome (259952).

The spelling of 135421 in words is "one hundred thirty-five thousand, four hundred twenty-one".