1043312004 has 144 divisors (see below), whose sum is σ = 3134476800. Its totient is φ = 286288128.

The previous prime is 1043312003. The next prime is 1043312009. The reversal of 1043312004 is 4002133401.

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

It is not an unprimeable number, because it can be changed into a prime (1043312003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2681842 + ... + 2682230.

It is an arithmetic number, because the mean of its divisors is an integer number (21767200).

Almost surely, 2^1043312004 is an apocalyptic number.

1043312004 is a gapful number since it is divisible by the number (14) 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 1043312004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1567238400).

1043312004 is an abundant number, since it is smaller than the sum of its proper divisors (2091164796).

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

1043312004 is a wasteful number, since it uses less digits than its factorization.

1043312004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1043312004 is about 32300.3406173991. The cubic root of 1043312004 is about 1014.2337731141.

Adding to 1043312004 its reverse (4002133401), we get a palindrome (5045445405).

The spelling of 1043312004 in words is "one billion, forty-three million, three hundred twelve thousand, four".