553121 has 4 divisors (see below), whose sum is σ = 560772. Its totient is φ = 545472.

The previous prime is 553103. The next prime is 553123. The reversal of 553121 is 121355.

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 112225 + 440896 = 335^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 553121 - 2⁶ = 553057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 553121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3716 + ... + 3861.

It is an arithmetic number, because the mean of its divisors is an integer number (140193).

2⁵⁵³¹²¹ is an apocalyptic number.

It is an amenable number.

553121 is a deficient number, since it is larger than the sum of its proper divisors (7651).

553121 is an equidigital number, since it uses as much as digits as its factorization.

553121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650.

The product of its digits is 150, while the sum is 17.

The square root of 553121 is about 743.7210498567. The cubic root of 553121 is about 82.0868107013.

Adding to 553121 its reverse (121355), we get a palindrome (674476).

The spelling of 553121 in words is "five hundred fifty-three thousand, one hundred twenty-one".