421376 has 20 divisors (see below), whose sum is σ = 842952. Its totient is φ = 210432.

The previous prime is 421361. The next prime is 421381. The reversal of 421376 is 673124.

It is a congruent number.

It is an unprimeable number.

421376 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 101 + ... + 923.

2⁴²¹³⁷⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421476).

421376 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

421376 is an frugal number, since it uses more digits than its factorization.

421376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 825 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 421376 is about 649.1348088032. The cubic root of 421376 is about 74.9704179632.

It can be divided in two parts, 421 and 376, that added together give a palindrome (797).

The spelling of 421376 in words is "four hundred twenty-one thousand, three hundred seventy-six".