5550421 has 4 divisors (see below), whose sum is σ = 5585932. Its totient is φ = 5514912.

The previous prime is 5550403. The next prime is 5550427. The reversal of 5550421 is 1240555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4202500 + 1347921 = 2050^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 5550421 - 2⁹ = 5549909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5550392 and 5550401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5550427) 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 3 ways as a sum of consecutive naturals, for example, 17520 + ... + 17833.

It is an arithmetic number, because the mean of its divisors is an integer number (1396483).

Almost surely, 2^5550421 is an apocalyptic number.

It is an amenable number.

5550421 is a deficient number, since it is larger than the sum of its proper divisors (35511).

5550421 is a wasteful number, since it uses less digits than its factorization.

5550421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35510.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 5550421 is about 2355.9331484573. The cubic root of 5550421 is about 177.0551819179.

Adding to 5550421 its reverse (1240555), we get a palindrome (6790976).

The spelling of 5550421 in words is "five million, five hundred fifty thousand, four hundred twenty-one".