1670885 has 4 divisors (see below), whose sum is σ = 2005068. Its totient is φ = 1336704.

The previous prime is 1670863. The next prime is 1670887. The reversal of 1670885 is 5880761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5880761 = 397 ⋅14813.

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 454276 = 1103^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670885 - 2⁸ = 1670629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670887) 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, 167084 + ... + 167093.

It is an arithmetic number, because the mean of its divisors is an integer number (501267).

2^1670885 is an apocalyptic number.

It is an amenable number.

1670885 is a deficient number, since it is larger than the sum of its proper divisors (334183).

1670885 is an equidigital number, since it uses as much as digits as its factorization.

1670885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334182.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 1670885 is about 1292.6271697593. The cubic root of 1670885 is about 118.6630536220.

The spelling of 1670885 in words is "one million, six hundred seventy thousand, eight hundred eighty-five".