1244621163 has 8 divisors (see below), whose sum is σ = 1746836800. Its totient is φ = 786076488.

The previous prime is 1244621143. The next prime is 1244621173. The reversal of 1244621163 is 3611264421.

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

It is not a de Polignac number, because 1244621163 - 2⁶ = 1244621099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1244621163.

It is not an unprimeable number, because it can be changed into a prime (1244621113) 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 7 ways as a sum of consecutive naturals, for example, 10917673 + ... + 10917786.

It is an arithmetic number, because the mean of its divisors is an integer number (218354600).

Almost surely, 2^1244621163 is an apocalyptic number.

1244621163 is a deficient number, since it is larger than the sum of its proper divisors (502215637).

1244621163 is a wasteful number, since it uses less digits than its factorization.

1244621163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21835481.

The product of its digits is 6912, while the sum is 30.

The square root of 1244621163 is about 35279.1888087014. The cubic root of 1244621163 is about 1075.6700097219.

Adding to 1244621163 its reverse (3611264421), we get a palindrome (4855885584).

The spelling of 1244621163 in words is "one billion, two hundred forty-four million, six hundred twenty-one thousand, one hundred sixty-three".