1000555 has 8 divisors (see below), whose sum is σ = 1213632. Its totient is φ = 791808.

The previous prime is 1000547. The next prime is 1000577. The reversal of 1000555 is 5550001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000555 - 2³ = 1000547 is a prime.

It is a super-2 number, since 2×1000555² = 2002220616050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 547 + ... + 1516.

It is an arithmetic number, because the mean of its divisors is an integer number (151704).

2^1000555 is an apocalyptic number.

1000555 is a deficient number, since it is larger than the sum of its proper divisors (213077).

1000555 is an equidigital number, since it uses as much as digits as its factorization.

1000555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165.

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 1000555 is about 1000.2774615076. The cubic root of 1000555 is about 100.0184965786.

Adding to 1000555 its reverse (5550001), we get a palindrome (6550556).

The spelling of 1000555 in words is "one million, five hundred fifty-five", and thus it is an aban number.