1224212004 has 54 divisors (see below), whose sum is σ = 3148196870. Its totient is φ = 401113152.

The previous prime is 1224211991. The next prime is 1224212039. The reversal of 1224212004 is 4002124221.

It can be written as a sum of positive squares in only one way, i.e., 970447104 + 253764900 = 31152^2 + 15930^2 .

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 17 ways as a sum of consecutive naturals, for example, 120432 + ... + 130200.

Almost surely, 2^1224212004 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 1224212004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574098435).

1224212004 is an abundant number, since it is smaller than the sum of its proper divisors (1923984866).

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

1224212004 is a wasteful number, since it uses less digits than its factorization.

1224212004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9897 (or 9833 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1224212004 is about 34988.7411033892. The cubic root of 1224212004 is about 1069.7580039100.

Adding to 1224212004 its reverse (4002124221), we get a palindrome (5226336225).

The spelling of 1224212004 in words is "one billion, two hundred twenty-four million, two hundred twelve thousand, four".