555240 has 64 divisors (see below), whose sum is σ = 1906560. Its totient is φ = 126720.

The previous prime is 555221. The next prime is 555251. The reversal of 555240 is 42555.

555240 = T₆₃ + T₆₄ + ... + T₁₅₂.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 555240.

It is an unprimeable number.

555240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510 + ... + 1170.

It is an arithmetic number, because the mean of its divisors is an integer number (29790).

2⁵⁵⁵²⁴⁰ 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 555240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953280).

555240 is an abundant number, since it is smaller than the sum of its proper divisors (1351320).

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

555240 is a wasteful number, since it uses less digits than its factorization.

555240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 555240 is about 745.1442813308. The cubic root of 555240 is about 82.1915016581.

Adding to 555240 its reverse (42555), we get a palindrome (597795).

The spelling of 555240 in words is "five hundred fifty-five thousand, two hundred forty".