555641 has 4 divisors (see below), whose sum is σ = 557172. Its totient is φ = 554112.

The previous prime is 555637. The next prime is 555661. The reversal of 555641 is 146555.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 146555 = 5 ⋅29311.

It can be written as a sum of positive squares in 2 ways, for example, as 160000 + 395641 = 400^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 555641 - 2² = 555637 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 555641.

It is not an unprimeable number, because it can be changed into a prime (555661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125 + ... + 1061.

It is an arithmetic number, because the mean of its divisors is an integer number (139293).

2⁵⁵⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

555641 is a deficient number, since it is larger than the sum of its proper divisors (1531).

555641 is an equidigital number, since it uses as much as digits as its factorization.

555641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530.

The product of its digits is 3000, while the sum is 26.

The square root of 555641 is about 745.4133081721. The cubic root of 555641 is about 82.2112834107.

The spelling of 555641 in words is "five hundred fifty-five thousand, six hundred forty-one".