1871144 has 24 divisors (see below), whose sum is σ = 3858330. Its totient is φ = 850080.

The previous prime is 1871137. The next prime is 1871147. The reversal of 1871144 is 4411781.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 407044 = 1210^2 + 638^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1871147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2 + ... + 1934.

2^1871144 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 1871144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1929165).

1871144 is an abundant number, since it is smaller than the sum of its proper divisors (1987186).

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

1871144 is a wasteful number, since it uses less digits than its factorization.

1871144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961 (or 1946 counting only the distinct ones).

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

The square root of 1871144 is about 1367.8976569905. The cubic root of 1871144 is about 123.2260149145.

It can be divided in two parts, 187 and 1144, that added together give a palindrome (1331).

The spelling of 1871144 in words is "one million, eight hundred seventy-one thousand, one hundred forty-four".