1671009 has 8 divisors (see below), whose sum is σ = 2304960. Its totient is φ = 1075536.

The previous prime is 1670983. The next prime is 1671041. The reversal of 1671009 is 9001761.

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

It is not a de Polignac number, because 1671009 - 2¹² = 1666913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1671009.

It is not an unprimeable number, because it can be changed into a prime (1671209) 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 7 ways as a sum of consecutive naturals, for example, 9517 + ... + 9690.

It is an arithmetic number, because the mean of its divisors is an integer number (288120).

2^1671009 is an apocalyptic number.

It is an amenable number.

1671009 is a deficient number, since it is larger than the sum of its proper divisors (633951).

1671009 is a wasteful number, since it uses less digits than its factorization.

1671009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19239.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 1671009 is about 1292.6751332025. The cubic root of 1671009 is about 118.6659889636.

It can be divided in two parts, 167 and 1009, that added together give a triangular number (1176 = T₄₈).

The spelling of 1671009 in words is "one million, six hundred seventy-one thousand, nine".