1804212 has 36 divisors (see below), whose sum is σ = 4761120. Its totient is φ = 574992.

The previous prime is 1804207. The next prime is 1804213. The reversal of 1804212 is 2124081.

1804212 = 269² + 270² + ... + 291².

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262 + ... + 1917.

2^1804212 is an apocalyptic number.

1804212 is a gapful number since it is divisible by the number (12) 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 1804212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2380560).

1804212 is an abundant number, since it is smaller than the sum of its proper divisors (2956908).

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

1804212 is a wasteful number, since it uses less digits than its factorization.

1804212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212 (or 2207 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1804212 is about 1343.2095890069. The cubic root of 1804212 is about 121.7388483504.

Adding to 1804212 its reverse (2124081), we get a palindrome (3928293).

It can be divided in two parts, 1804 and 212, that added together give a triangular number (2016 = T₆₃).

The spelling of 1804212 in words is "one million, eight hundred four thousand, two hundred twelve".