554421 has 16 divisors (see below), whose sum is σ = 895104. Its totient is φ = 297984.

The previous prime is 554419. The next prime is 554431. The reversal of 554421 is 124455.

It is not a de Polignac number, because 554421 - 2¹ = 554419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (55944).

2⁵⁵⁴⁴²¹ is an apocalyptic number.

554421 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

554421 is a deficient number, since it is larger than the sum of its proper divisors (340683).

554421 is a wasteful number, since it uses less digits than its factorization.

554421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580.

The product of its digits is 800, while the sum is 21.

The square root of 554421 is about 744.5945205278. The cubic root of 554421 is about 82.1510699143.

Adding to 554421 its reverse (124455), we get a palindrome (678876).

It can be divided in two parts, 5544 and 21, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 554421 in words is "five hundred fifty-four thousand, four hundred twenty-one".