1244122405 has 4 divisors (see below), whose sum is σ = 1492946892. Its totient is φ = 995297920.

The previous prime is 1244122391. The next prime is 1244122427. The reversal of 1244122405 is 5042214421.

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 425761956 + 818360449 = 20634^2 + 28607^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1244122405 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 1244122405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124412236 + ... + 124412245.

It is an arithmetic number, because the mean of its divisors is an integer number (373236723).

Almost surely, 2^1244122405 is an apocalyptic number.

It is an amenable number.

1244122405 is a deficient number, since it is larger than the sum of its proper divisors (248824487).

1244122405 is an equidigital number, since it uses as much as digits as its factorization.

1244122405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248824486.

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

The square root of 1244122405 is about 35272.1193721046. The cubic root of 1244122405 is about 1075.5263058334.

Adding to 1244122405 its reverse (5042214421), we get a palindrome (6286336826).

The spelling of 1244122405 in words is "one billion, two hundred forty-four million, one hundred twenty-two thousand, four hundred five".