1001043 has 6 divisors (see below), whose sum is σ = 1445964. Its totient is φ = 667356.

The previous prime is 1001041. The next prime is 1001069. The reversal of 1001043 is 3401001.

It is not a de Polignac number, because 1001043 - 2¹ = 1001041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 111227 = 1001043 / (1 + 0 + 0 + 1 + 0 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (1001041) 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 5 ways as a sum of consecutive naturals, for example, 55605 + ... + 55622.

It is an arithmetic number, because the mean of its divisors is an integer number (240994).

2^1001043 is an apocalyptic number.

1001043 is a deficient number, since it is larger than the sum of its proper divisors (444921).

1001043 is a wasteful number, since it uses less digits than its factorization.

1001043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111233 (or 111230 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1001043 is about 1000.5213640897. The cubic root of 1001043 is about 100.0347545865.

Adding to 1001043 its reverse (3401001), we get a palindrome (4402044).

The spelling of 1001043 in words is "one million, one thousand, forty-three".