1670871 has 4 divisors (see below), whose sum is σ = 2227832. Its totient is φ = 1113912.

The previous prime is 1670863. The next prime is 1670887. The reversal of 1670871 is 1780761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1780761 = 3 ⋅593587.

It is not a de Polignac number, because 1670871 - 2³ = 1670863 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278476 + ... + 278481.

It is an arithmetic number, because the mean of its divisors is an integer number (556958).

2^1670871 is an apocalyptic number.

1670871 is a deficient number, since it is larger than the sum of its proper divisors (556961).

1670871 is an equidigital number, since it uses as much as digits as its factorization.

1670871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556960.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 1670871 is about 1292.6217544201. The cubic root of 1670871 is about 118.6627222033.

The spelling of 1670871 in words is "one million, six hundred seventy thousand, eight hundred seventy-one".