552721 has 16 divisors (see below), whose sum is σ = 656208.
Its totient is φ = 460800.
The previous prime is 552709. The next prime is 552731. The reversal of 552721 is 127255.
It can be written as a sum of positive squares in 8 ways, for example, as 192721 + 360000 = 439^2 + 600^2
It is a 3-Lehmer number, since φ(552721) divides (552721-1)3.
It is a cyclic number.
It is a Carmichael number.
It is not a de Polignac number, because 552721 - 219 = 28433 is a prime.
It is a deceptive number, since it divides R552720.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 552692 and 552701.
It is not an unprimeable number, because it can be changed into a prime (552731) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9031 + ... + 9091.
It is an arithmetic number, because the mean of its divisors is an integer number (41013).
It is a Poulet number, since it divides 2552720-1.
2552721 is an apocalyptic number.
It is an amenable number.
552721 is a deficient number, since it is larger than the sum of its proper divisors (103487).
552721 is a wasteful number, since it uses less digits than its factorization.
552721 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 132.
The product of its digits is 700, while the sum is 22.
The square root of 552721 is about 743.4520831903.
The cubic root of 552721 is about 82.0670183819.
Adding to 552721 its reverse (127255), we get a palindrome (679976).
The spelling of 552721 in words is "five hundred fifty-two thousand, seven hundred twenty-one".