555140 has 24 divisors (see below), whose sum is σ = 1195992. Its totient is φ = 216320.

The previous prime is 555119. The next prime is 555143. The reversal of 555140 is 41555.

It can be written as a sum of positive squares in 4 ways, for example, as 81796 + 473344 = 286^2 + 688^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555143) by changing a digit.

555140 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 482 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (49833).

2⁵⁵⁵¹⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597996).

555140 is an abundant number, since it is smaller than the sum of its proper divisors (640852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

555140 is a wasteful number, since it uses less digits than its factorization.

555140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 555140 is about 745.0771772105. The cubic root of 555140 is about 82.1865670691.

Adding to 555140 its reverse (41555), we get a palindrome (596695).

The spelling of 555140 in words is "five hundred fifty-five thousand, one hundred forty".