5550921 has 6 divisors (see below), whose sum is σ = 8018010. Its totient is φ = 3700608.

The previous prime is 5550917. The next prime is 5550929. The reversal of 5550921 is 1290555.

It can be written as a sum of positive squares in only one way, i.e., 4928400 + 622521 = 2220^2 + 789^2 .

It is not a de Polignac number, because 5550921 - 2² = 5550917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5550929) 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 5 ways as a sum of consecutive naturals, for example, 308376 + ... + 308393.

It is an arithmetic number, because the mean of its divisors is an integer number (1336335).

Almost surely, 2^5550921 is an apocalyptic number.

It is an amenable number.

5550921 is a deficient number, since it is larger than the sum of its proper divisors (2467089).

5550921 is a wasteful number, since it uses less digits than its factorization.

5550921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616775 (or 616772 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 5550921 is about 2356.0392611330. The cubic root of 5550921 is about 177.0604983274.

The spelling of 5550921 in words is "five million, five hundred fifty thousand, nine hundred twenty-one".