1212804 has 36 divisors (see below), whose sum is σ = 3123120. Its totient is φ = 396720.

The previous prime is 1212793. The next prime is 1212811. The reversal of 1212804 is 4082121.

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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1839 + ... + 2409.

2^1212804 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 1212804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1561560).

1212804 is an abundant number, since it is smaller than the sum of its proper divisors (1910316).

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

1212804 is a wasteful number, since it uses less digits than its factorization.

1212804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 635 counting only the distinct ones).

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

The square root of 1212804 is about 1101.2738079152. The cubic root of 1212804 is about 106.6424728114.

Adding to 1212804 its reverse (4082121), we get a palindrome (5294925).

It can be divided in two parts, 1212 and 804, that added together give a triangular number (2016 = T₆₃).

The spelling of 1212804 in words is "one million, two hundred twelve thousand, eight hundred four".