1243004004 has 36 divisors (see below), whose sum is σ = 3427678800. Its totient is φ = 376667760.

The previous prime is 1243003961. The next prime is 1243004017. The reversal of 1243004004 is 4004003421.

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, 1569054 + ... + 1569845.

It is an arithmetic number, because the mean of its divisors is an integer number (95213300).

Almost surely, 2^1243004004 is an apocalyptic number.

It is an amenable number.

1243004004 is an abundant number, since it is smaller than the sum of its proper divisors (2184674796).

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

1243004004 is a wasteful number, since it uses less digits than its factorization.

1243004004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138920 (or 3138915 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1243004004 is about 35256.2619118930. The cubic root of 1243004004 is about 1075.2039285737.

Adding to 1243004004 its reverse (4004003421), we get a palindrome (5247007425).

The spelling of 1243004004 in words is "one billion, two hundred forty-three million, four thousand, four".