1670005 has 8 divisors (see below), whose sum is σ = 2109600. Its totient is φ = 1265616.

The previous prime is 1670003. The next prime is 1670017. The reversal of 1670005 is 5000761.

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

It is a cyclic number.

It is not a de Polignac number, because 1670005 - 2¹ = 1670003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

1670005 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8695 + ... + 8884.

It is an arithmetic number, because the mean of its divisors is an integer number (263700).

2^1670005 is an apocalyptic number.

It is an amenable number.

1670005 is a deficient number, since it is larger than the sum of its proper divisors (439595).

1670005 is a wasteful number, since it uses less digits than its factorization.

1670005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17603.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1670005 is about 1292.2867328886. The cubic root of 1670005 is about 118.6422179920.

Adding to 1670005 its reverse (5000761), we get a palindrome (6670766).

The spelling of 1670005 in words is "one million, six hundred seventy thousand, five".