1244011243 has 4 divisors (see below), whose sum is σ = 1256328288. Its totient is φ = 1231694200.

The previous prime is 1244011229. The next prime is 1244011253. The reversal of 1244011243 is 3421104421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244011243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244011253) 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, 6158371 + ... + 6158572.

It is an arithmetic number, because the mean of its divisors is an integer number (314082072).

Almost surely, 2^1244011243 is an apocalyptic number.

1244011243 is a deficient number, since it is larger than the sum of its proper divisors (12317045).

1244011243 is a wasteful number, since it uses less digits than its factorization.

1244011243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12317044.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1244011243 is about 35270.5435597469. The cubic root of 1244011243 is about 1075.4942722179.

Adding to 1244011243 its reverse (3421104421), we get a palindrome (4665115664).

The spelling of 1244011243 in words is "one billion, two hundred forty-four million, eleven thousand, two hundred forty-three".