1671872 has 28 divisors (see below), whose sum is σ = 3358896. Its totient is φ = 825600.

The previous prime is 1671781. The next prime is 1671907. The reversal of 1671872 is 2781761.

It is a Harshad number since it is a multiple of its sum of digits (32).

Its product of digits (4704) is a multiple of the sum of its prime factors (336).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9578 + ... + 9750.

2^1671872 is an apocalyptic number.

It is an amenable number.

1671872 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1671872 is a wasteful number, since it uses less digits than its factorization.

1671872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 326 counting only the distinct ones).

The product of its digits is 4704, while the sum is 32.

The square root of 1671872 is about 1293.0088940143. The cubic root of 1671872 is about 118.6864139730.

The spelling of 1671872 in words is "one million, six hundred seventy-one thousand, eight hundred seventy-two".