1971872 has 24 divisors (see below), whose sum is σ = 4437216. Its totient is φ = 844992.

The previous prime is 1971869. The next prime is 1971887. The reversal of 1971872 is 2781791.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4178 + ... + 4625.

It is an arithmetic number, because the mean of its divisors is an integer number (184884).

2^1971872 is an apocalyptic number.

It is an amenable number.

1971872 is an abundant number, since it is smaller than the sum of its proper divisors (2465344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1971872 is an equidigital number, since it uses as much as digits as its factorization.

1971872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820 (or 8812 counting only the distinct ones).

The product of its digits is 7056, while the sum is 35.

The square root of 1971872 is about 1404.2335988004. The cubic root of 1971872 is about 125.3986631896.

The spelling of 1971872 in words is "one million, nine hundred seventy-one thousand, eight hundred seventy-two".