1803120 has 80 divisors (see below), whose sum is σ = 6106752. Its totient is φ = 436480.

The previous prime is 1803103. The next prime is 1803127. The reversal of 1803120 is 213081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1803120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2299 + ... + 2981.

2^1803120 is an apocalyptic number.

1803120 is a gapful number since it is divisible by the number (10) 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 1803120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3053376).

1803120 is an abundant number, since it is smaller than the sum of its proper divisors (4303632).

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

1803120 is a wasteful number, since it uses less digits than its factorization.

1803120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710 (or 704 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1803120 is about 1342.8030384237. The cubic root of 1803120 is about 121.7142825655.

The spelling of 1803120 in words is "one million, eight hundred three thousand, one hundred twenty".