1244122420 has 12 divisors (see below), whose sum is σ = 2612657124. Its totient is φ = 497648960.

The previous prime is 1244122391. The next prime is 1244122427. The reversal of 1244122420 is 242214421.

It can be written as a sum of positive squares in 2 ways, for example, as 822312976 + 421809444 = 28676^2 + 20538^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1244122391 and 1244122400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244122427) 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, 31103041 + ... + 31103080.

It is an arithmetic number, because the mean of its divisors is an integer number (217721427).

Almost surely, 2^1244122420 is an apocalyptic number.

1244122420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244122420 is an abundant number, since it is smaller than the sum of its proper divisors (1368534704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1244122420 is a wasteful number, since it uses less digits than its factorization.

1244122420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62206130 (or 62206128 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1244122420 is about 35272.1195847372. The cubic root of 1244122420 is about 1075.5263101558.

Adding to 1244122420 its reverse (242214421), we get a palindrome (1486336841).

The spelling of 1244122420 in words is "one billion, two hundred forty-four million, one hundred twenty-two thousand, four hundred twenty".