1243204001 has 8 divisors (see below), whose sum is σ = 1343569920. Its totient is φ = 1143514512.

The previous prime is 1243203979. The next prime is 1243204019. The reversal of 1243204001 is 1004023421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243204001 - 2⁶ = 1243203937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243204201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165281 + ... + 172638.

It is an arithmetic number, because the mean of its divisors is an integer number (167946240).

Almost surely, 2^1243204001 is an apocalyptic number.

It is an amenable number.

1243204001 is a deficient number, since it is larger than the sum of its proper divisors (100365919).

1243204001 is a wasteful number, since it uses less digits than its factorization.

1243204001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338215.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1243204001 is about 35259.0981308371. The cubic root of 1243204001 is about 1075.2615915759.

Adding to 1243204001 its reverse (1004023421), we get a palindrome (2247227422).

The spelling of 1243204001 in words is "one billion, two hundred forty-three million, two hundred four thousand, one".