1670671 has 4 divisors (see below), whose sum is σ = 1673392. Its totient is φ = 1667952.

The previous prime is 1670659. The next prime is 1670687. The reversal of 1670671 is 1760761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1760761 = 47 ⋅37463.

It is a cyclic number.

It is not a de Polignac number, because 1670671 - 2⁵ = 1670639 is a prime.

It is a super-2 number, since 2×1670671² = 5582283180482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670171) 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, 46 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (418348).

2^1670671 is an apocalyptic number.

1670671 is a deficient number, since it is larger than the sum of its proper divisors (2721).

1670671 is an equidigital number, since it uses as much as digits as its factorization.

1670671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 1670671 is about 1292.5443899534. The cubic root of 1670671 is about 118.6579874489.

The spelling of 1670671 in words is "one million, six hundred seventy thousand, six hundred seventy-one".