5550721 has 8 divisors (see below), whose sum is σ = 6411744. Its totient is φ = 4749120.

The previous prime is 5550719. The next prime is 5550733. The reversal of 5550721 is 1270555.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5550721 - 2¹ = 5550719 is a prime.

It is a Duffinian number.

5550721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5550121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14655 + ... + 15028.

It is an arithmetic number, because the mean of its divisors is an integer number (801468).

Almost surely, 2^5550721 is an apocalyptic number.

It is an amenable number.

5550721 is a deficient number, since it is larger than the sum of its proper divisors (861023).

5550721 is a wasteful number, since it uses less digits than its factorization.

5550721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29711.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 5550721 is about 2355.9968166362. The cubic root of 5550721 is about 177.0583718019.

The spelling of 5550721 in words is "five million, five hundred fifty thousand, seven hundred twenty-one".