854421 has 4 divisors (see below), whose sum is σ = 1139232. Its totient is φ = 569612.

The previous prime is 854419. The next prime is 854423. The reversal of 854421 is 124458.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (854419) and next prime (854423).

It is a cyclic number.

It is not a de Polignac number, because 854421 - 2¹ = 854419 is a prime.

It is a D-number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 854391 and 854400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142401 + ... + 142406.

It is an arithmetic number, because the mean of its divisors is an integer number (284808).

2⁸⁵⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

854421 is a deficient number, since it is larger than the sum of its proper divisors (284811).

854421 is a wasteful number, since it uses less digits than its factorization.

854421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284810.

The product of its digits is 1280, while the sum is 24.

The square root of 854421 is about 924.3489600795. The cubic root of 854421 is about 94.8907701171.

Adding to 854421 its reverse (124458), we get a palindrome (978879).

It can be divided in two parts, 854 and 421, that added together give a triangular number (1275 = T₅₀).

The spelling of 854421 in words is "eight hundred fifty-four thousand, four hundred twenty-one".