1871272 has 32 divisors (see below), whose sum is σ = 3981600. Its totient is φ = 817344.

The previous prime is 1871263. The next prime is 1871279. The reversal of 1871272 is 2721781.

It is a self number, because there is not a number n which added to its sum of digits gives 1871272.

It is not an unprimeable number, because it can be changed into a prime (1871279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1503 + ... + 2449.

It is an arithmetic number, because the mean of its divisors is an integer number (124425).

2^1871272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1871272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1990800).

1871272 is an abundant number, since it is smaller than the sum of its proper divisors (2110328).

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

1871272 is a wasteful number, since it uses less digits than its factorization.

1871272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 981 counting only the distinct ones).

The product of its digits is 1568, while the sum is 28.

The square root of 1871272 is about 1367.9444433163. The cubic root of 1871272 is about 123.2288247054.

The spelling of 1871272 in words is "one million, eight hundred seventy-one thousand, two hundred seventy-two".