1244111009 has 16 divisors (see below), whose sum is σ = 1328970240. Its totient is φ = 1162464160.

The previous prime is 1244110969. The next prime is 1244111047. The reversal of 1244111009 is 9001114421.

It is not a de Polignac number, because 1244111009 - 2⁸ = 1244110753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1244111069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2387669 + ... + 2388189.

It is an arithmetic number, because the mean of its divisors is an integer number (83060640).

Almost surely, 2^1244111009 is an apocalyptic number.

It is an amenable number.

1244111009 is a deficient number, since it is larger than the sum of its proper divisors (84859231).

1244111009 is an frugal number, since it uses more digits than its factorization.

1244111009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1244111009 is about 35271.9578277135. The cubic root of 1244111009 is about 1075.5230219295.

The spelling of 1244111009 in words is "one billion, two hundred forty-four million, one hundred eleven thousand, nine".