1244113209 has 32 divisors (see below), whose sum is σ = 1867120640. Its totient is φ = 818684496.

The previous prime is 1244113201. The next prime is 1244113219. The reversal of 1244113209 is 9023114421.

It is a happy number.

1244113209 is a `hidden beast` number, since 1 + 2 + 441 + 13 + 209 = 666.

It is not a de Polignac number, because 1244113209 - 2³ = 1244113201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1244113201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 763854 + ... + 765480.

It is an arithmetic number, because the mean of its divisors is an integer number (58347520).

Almost surely, 2^1244113209 is an apocalyptic number.

It is an amenable number.

1244113209 is a deficient number, since it is larger than the sum of its proper divisors (623007431).

1244113209 is a wasteful number, since it uses less digits than its factorization.

1244113209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1244113209 is about 35271.9890139470. The cubic root of 1244113209 is about 1075.5236558894.

The spelling of 1244113209 in words is "one billion, two hundred forty-four million, one hundred thirteen thousand, two hundred nine".