1000845 has 24 divisors (see below), whose sum is σ = 1812096. Its totient is φ = 510048.

The previous prime is 1000829. The next prime is 1000847. The reversal of 1000845 is 5480001.

It is not a de Polignac number, because 1000845 - 2⁴ = 1000829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000847) 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 23 ways as a sum of consecutive naturals, for example, 552 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (75504).

2^1000845 is an apocalyptic number.

1000845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1000845 is a deficient number, since it is larger than the sum of its proper divisors (811251).

1000845 is a wasteful number, since it uses less digits than its factorization.

1000845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1000845 is about 1000.4224107846. The cubic root of 1000845 is about 100.0281587368.

Adding to 1000845 its reverse (5480001), we get a palindrome (6480846).

The spelling of 1000845 in words is "one million, eight hundred forty-five", and thus it is an aban number.