1670385 has 16 divisors (see below), whose sum is σ = 2813760. Its totient is φ = 843840.

The previous prime is 1670359. The next prime is 1670399. The reversal of 1670385 is 5830761.

It is not a de Polignac number, because 1670385 - 2⁵ = 1670353 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2646 + ... + 3215.

It is an arithmetic number, because the mean of its divisors is an integer number (175860).

2^1670385 is an apocalyptic number.

1670385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1670385 is a deficient number, since it is larger than the sum of its proper divisors (1143375).

1670385 is a wasteful number, since it uses less digits than its factorization.

1670385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1670385 is about 1292.4337507199. The cubic root of 1670385 is about 118.6512160936.

The spelling of 1670385 in words is "one million, six hundred seventy thousand, three hundred eighty-five".