1244121320 has 32 divisors (see below), whose sum is σ = 3014602920. Its totient is φ = 459367680.

The previous prime is 1244121317. The next prime is 1244121367. The reversal of 1244121320 is 231214421.

It can be written as a sum of positive squares in 4 ways, for example, as 641811556 + 602309764 = 25334^2 + 24542^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1244121292 and 1244121301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195751 + ... + 1196790.

Almost surely, 2^1244121320 is an apocalyptic number.

1244121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244121320 is an abundant number, since it is smaller than the sum of its proper divisors (1770481600).

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

1244121320 is a wasteful number, since it uses less digits than its factorization.

1244121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392565 (or 2392561 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1244121320 is about 35272.1039916816. The cubic root of 1244121320 is about 1075.5259931776.

Adding to 1244121320 its reverse (231214421), we get a palindrome (1475335741).

The spelling of 1244121320 in words is "one billion, two hundred forty-four million, one hundred twenty-one thousand, three hundred twenty".