1670986 has 8 divisors (see below), whose sum is σ = 2516544. Its totient is φ = 832140.

The previous prime is 1670983. The next prime is 1671041. The reversal of 1670986 is 6890761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1670983) 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, 1000 + ... + 2083.

It is an arithmetic number, because the mean of its divisors is an integer number (314568).

2^1670986 is an apocalyptic number.

1670986 is a deficient number, since it is larger than the sum of its proper divisors (845558).

1670986 is a wasteful number, since it uses less digits than its factorization.

1670986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1670986 is about 1292.6662368918. Note that the first 3 decimals coincide. The cubic root of 1670986 is about 118.6654445160.

The spelling of 1670986 in words is "one million, six hundred seventy thousand, nine hundred eighty-six".