555901 has 6 divisors (see below), whose sum is σ = 576602. Its totient is φ = 535920.

The previous prime is 555871. The next prime is 555931. The reversal of 555901 is 109555.

It is an interprime number because it is at equal distance from previous prime (555871) and next prime (555931).

It can be written as a sum of positive squares in 3 ways, for example, as 164025 + 391876 = 405^2 + 626^2 .

It is not a de Polignac number, because 555901 - 2¹³ = 547709 is a prime.

It is a Duffinian number.

555901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 511 + ... + 1171.

2⁵⁵⁵⁹⁰¹ is an apocalyptic number.

It is an amenable number.

555901 is a deficient number, since it is larger than the sum of its proper divisors (20701).

555901 is an equidigital number, since it uses as much as digits as its factorization.

555901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 555901 is about 745.5876876666. The cubic root of 555901 is about 82.2241043992.

The spelling of 555901 in words is "five hundred fifty-five thousand, nine hundred one".