1244001113 has 4 divisors (see below), whose sum is σ = 1244086500. Its totient is φ = 1243915728.

The previous prime is 1244001091. The next prime is 1244001151. The reversal of 1244001113 is 3111004421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3111004421 = 7 ⋅444429203.

It can be written as a sum of positive squares in 2 ways, for example, as 273803209 + 970197904 = 16547^2 + 31148^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244001113 - 2²⁰ = 1242952537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1244001091 and 1244001100.

It is not an unprimeable number, because it can be changed into a prime (1244051113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14738 + ... + 52011.

It is an arithmetic number, because the mean of its divisors is an integer number (311021625).

Almost surely, 2^1244001113 is an apocalyptic number.

It is an amenable number.

1244001113 is a deficient number, since it is larger than the sum of its proper divisors (85387).

1244001113 is an equidigital number, since it uses as much as digits as its factorization.

1244001113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85386.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1244001113 is about 35270.3999552032. The cubic root of 1244001113 is about 1075.4913529553.

Adding to 1244001113 its reverse (3111004421), we get a palindrome (4355005534).

The spelling of 1244001113 in words is "one billion, two hundred forty-four million, one thousand, one hundred thirteen".