1800872 has 8 divisors (see below), whose sum is σ = 3376650. Its totient is φ = 900432.

The previous prime is 1800863. The next prime is 1800889. The reversal of 1800872 is 2780081.

It can be written as a sum of positive squares in only one way, i.e., 1779556 + 21316 = 1334^2 + 146^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112547 + ... + 112562.

2^1800872 is an apocalyptic number.

It is an amenable number.

1800872 is a deficient number, since it is larger than the sum of its proper divisors (1575778).

1800872 is a wasteful number, since it uses less digits than its factorization.

1800872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225115 (or 225111 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 1800872 is about 1341.9657223640. The cubic root of 1800872 is about 121.6636800001.

The spelling of 1800872 in words is "one million, eight hundred thousand, eight hundred seventy-two".