555121 has 6 divisors (see below), whose sum is σ = 645810. Its totient is φ = 475776.

The previous prime is 555119. The next prime is 555143. The reversal of 555121 is 121555.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 112896 = 665^2 + 336^2 .

It is not a de Polignac number, because 555121 - 2¹ = 555119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5616 + ... + 5713.

It is an arithmetic number, because the mean of its divisors is an integer number (107635).

2⁵⁵⁵¹²¹ is an apocalyptic number.

It is an amenable number.

555121 is a deficient number, since it is larger than the sum of its proper divisors (90689).

555121 is a wasteful number, since it uses less digits than its factorization.

555121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11343 (or 11336 counting only the distinct ones).

The product of its digits is 250, while the sum is 19.

The square root of 555121 is about 745.0644267444. The cubic root of 555121 is about 82.1856294302.

Adding to 555121 its reverse (121555), we get a palindrome (676676).

It can be divided in two parts, 555 and 121, that added together give a palindrome (676).

The spelling of 555121 in words is "five hundred fifty-five thousand, one hundred twenty-one".