1000557 has 12 divisors (see below), whose sum is σ = 1460160.
Its totient is φ = 660168.
The previous prime is 1000547. The next prime is 1000577. The reversal of 1000557 is 7550001.
Adding to 1000557 its reverse (7550001), we get a palindrome (8550558).
It is a happy number.
It is not a de Polignac number, because 1000557 - 24 = 1000541 is a prime.
It is a super-2 number, since 2×10005572 = 2002228620498, which contains 22 as substring.
1000557 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1000507) 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 11 ways as a sum of consecutive naturals, for example, 444 + ... + 1482.
It is an arithmetic number, because the mean of its divisors is an integer number (121680).
21000557 is an apocalyptic number.
It is an amenable number.
1000557 is a deficient number, since it is larger than the sum of its proper divisors (459603).
1000557 is a wasteful number, since it uses less digits than its factorization.
1000557 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1152 (or 1149 counting only the distinct ones).
The product of its (nonzero) digits is 175, while the sum is 18.
The square root of 1000557 is about 1000.2784612297.
The cubic root of 1000557 is about 100.0185632205.
The spelling of 1000557 in words is "one million, five hundred fifty-seven", and thus it is an aban number.