134421 has 16 divisors (see below), whose sum is σ = 211584. Its totient is φ = 74304.

The previous prime is 134417. The next prime is 134437. The reversal of 134421 is 124431.

134421 is a nontrivial binomial coefficient, being equal to C(519, 2).

It is not a de Polignac number, because 134421 - 2² = 134417 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 134421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134401) 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 15 ways as a sum of consecutive naturals, for example, 691 + ... + 863.

It is an arithmetic number, because the mean of its divisors is an integer number (13224).

2¹³⁴⁴²¹ is an apocalyptic number.

134421 is the 518-th triangular number.

It is an amenable number.

134421 is a deficient number, since it is larger than the sum of its proper divisors (77163).

134421 is a wasteful number, since it uses less digits than its factorization.

134421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its digits is 96, while the sum is 15.

The square root of 134421 is about 366.6346955759. The cubic root of 134421 is about 51.2258343338.

Adding to 134421 its reverse (124431), we get a palindrome (258852).

It can be divided in two parts, 1344 and 21, that multiplied together give a square (28224 = 168²).

The spelling of 134421 in words is "one hundred thirty-four thousand, four hundred twenty-one".