1868671 has 4 divisors (see below), whose sum is σ = 2135632. Its totient is φ = 1601712.

The previous prime is 1868663. The next prime is 1868677. The reversal of 1868671 is 1768681.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1868671 - 2³ = 1868663 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1868671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868677) 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, 133470 + ... + 133483.

It is an arithmetic number, because the mean of its divisors is an integer number (533908).

2^1868671 is an apocalyptic number.

1868671 is a deficient number, since it is larger than the sum of its proper divisors (266961).

1868671 is an equidigital number, since it uses as much as digits as its factorization.

1868671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266960.

The product of its digits is 16128, while the sum is 37.

The square root of 1868671 is about 1366.9934162241. The cubic root of 1868671 is about 123.1717037041.

The spelling of 1868671 in words is "one million, eight hundred sixty-eight thousand, six hundred seventy-one".