1002171 has 4 divisors (see below), whose sum is σ = 1336232. Its totient is φ = 668112.

The previous prime is 1002151. The next prime is 1002173. The reversal of 1002171 is 1712001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1712001 = 3 ⋅570667.

It is not a de Polignac number, because 1002171 - 2⁹ = 1001659 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002173) 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 3 ways as a sum of consecutive naturals, for example, 167026 + ... + 167031.

It is an arithmetic number, because the mean of its divisors is an integer number (334058).

2^1002171 is an apocalyptic number.

1002171 is a deficient number, since it is larger than the sum of its proper divisors (334061).

1002171 is an equidigital number, since it uses as much as digits as its factorization.

1002171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334060.

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 1002171 is about 1001.0849114835. The cubic root of 1002171 is about 100.0723143604.

Adding to 1002171 its reverse (1712001), we get a palindrome (2714172).

The spelling of 1002171 in words is "one million, two thousand, one hundred seventy-one".