1243222001 has 8 divisors (see below), whose sum is σ = 1421089344. Its totient is φ = 1065420720.

The previous prime is 1243221997. The next prime is 1243222009. The reversal of 1243222001 is 1002223421.

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

It is not a de Polignac number, because 1243222001 - 2² = 1243221997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243222009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34211 + ... + 60471.

It is an arithmetic number, because the mean of its divisors is an integer number (177636168).

Almost surely, 2^1243222001 is an apocalyptic number.

It is an amenable number.

1243222001 is a deficient number, since it is larger than the sum of its proper divisors (177867343).

1243222001 is an equidigital number, since it uses as much as digits as its factorization.

1243222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33031.

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

The square root of 1243222001 is about 35259.3533831805. The cubic root of 1243222001 is about 1075.2667810206.

Adding to 1243222001 its reverse (1002223421), we get a palindrome (2245445422).

The spelling of 1243222001 in words is "one billion, two hundred forty-three million, two hundred twenty-two thousand, one".