1801485 has 72 divisors (see below), whose sum is σ = 3912480. Its totient is φ = 762048.

The previous prime is 1801477. The next prime is 1801489. The reversal of 1801485 is 5841081.

1801485 is a `hidden beast` number, since 180 + 1 + 485 = 666.

It is not a de Polignac number, because 1801485 - 2³ = 1801477 is a prime.

1801485 is a modest number, since divided by 1485 gives 180 as remainder.

It is a Curzon number.

1801485 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41874 + ... + 41916.

It is an arithmetic number, because the mean of its divisors is an integer number (54340).

2^1801485 is an apocalyptic number.

1801485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1801485 is an abundant number, since it is smaller than the sum of its proper divisors (2110995).

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

1801485 is a wasteful number, since it uses less digits than its factorization.

1801485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 1801485 is about 1342.1940992271. The cubic root of 1801485 is about 121.6774828273.

The spelling of 1801485 in words is "one million, eight hundred one thousand, four hundred eighty-five".