1845144 has 72 divisors (see below), whose sum is σ = 5824260. Its totient is φ = 526176.

The previous prime is 1845143. The next prime is 1845149. The reversal of 1845144 is 4415481.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1845143) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3267 + ... + 3789.

2^1845144 is an apocalyptic number.

1845144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1845144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2912130).

1845144 is an abundant number, since it is smaller than the sum of its proper divisors (3979116).

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

1845144 is a wasteful number, since it uses less digits than its factorization.

1845144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 535 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 1845144 is about 1358.3607768189. The cubic root of 1845144 is about 122.6525989433.

The spelling of 1845144 in words is "one million, eight hundred forty-five thousand, one hundred forty-four".