1243202001 has 8 divisors (see below), whose sum is σ = 1666281984. Its totient is φ = 824461680.

The previous prime is 1243201991. The next prime is 1243202033. The reversal of 1243202001 is 1002023421.

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

It is not a de Polignac number, because 1243202001 - 2⁶ = 1243201937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243702001) 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, 1084246 + ... + 1085391.

It is an arithmetic number, because the mean of its divisors is an integer number (208285248).

Almost surely, 2^1243202001 is an apocalyptic number.

It is an amenable number.

1243202001 is a deficient number, since it is larger than the sum of its proper divisors (423079983).

1243202001 is a wasteful number, since it uses less digits than its factorization.

1243202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169831.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1243202001 is about 35259.0697693515. The cubic root of 1243202001 is about 1075.2610149679.

Adding to 1243202001 its reverse (1002023421), we get a palindrome (2245225422).

The spelling of 1243202001 in words is "one billion, two hundred forty-three million, two hundred two thousand, one".