1244412205 has 4 divisors (see below), whose sum is σ = 1493294652. Its totient is φ = 995529760.

The previous prime is 1244412203. The next prime is 1244412209. The reversal of 1244412205 is 5022144421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 695587876 + 548824329 = 26374^2 + 23427^2 .

It is not a de Polignac number, because 1244412205 - 2¹ = 1244412203 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 1244412205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244412203) 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, 124441216 + ... + 124441225.

It is an arithmetic number, because the mean of its divisors is an integer number (373323663).

Almost surely, 2^1244412205 is an apocalyptic number.

It is an amenable number.

1244412205 is a deficient number, since it is larger than the sum of its proper divisors (248882447).

1244412205 is an equidigital number, since it uses as much as digits as its factorization.

1244412205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248882446.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1244412205 is about 35276.2271933947. The cubic root of 1244412205 is about 1075.6098086903.

Adding to 1244412205 its reverse (5022144421), we get a palindrome (6266556626).

It can be divided in two parts, 12444 and 12205, that added together give a square (24649 = 157²).

The spelling of 1244412205 in words is "one billion, two hundred forty-four million, four hundred twelve thousand, two hundred five".