38421 has 8 divisors (see below), whose sum is σ = 56960. Its totient is φ = 25596.

The previous prime is 38393. The next prime is 38431. The reversal of 38421 is 12483.

It is a happy number.

It is not a de Polignac number, because 38421 - 2¹⁰ = 37397 is a prime.

It is a Duffinian number.

38421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 38394 and 38403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38431) 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 7 ways as a sum of consecutive naturals, for example, 685 + ... + 738.

It is an arithmetic number, because the mean of its divisors is an integer number (7120).

2³⁸⁴²¹ is an apocalyptic number.

It is an amenable number.

38421 is a deficient number, since it is larger than the sum of its proper divisors (18539).

38421 is a wasteful number, since it uses less digits than its factorization.

38421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432 (or 1426 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 38421 is about 196.0127546870. The cubic root of 38421 is about 33.7434555212.

The spelling of 38421 in words is "thirty-eight thousand, four hundred twenty-one".