1243241320 has 32 divisors (see below), whose sum is σ = 2824998120. Its totient is φ = 492371200.

The previous prime is 1243241317. The next prime is 1243241371. The reversal of 1243241320 is 231423421.

It can be written as a sum of positive squares in 4 ways, for example, as 1074397284 + 168844036 = 32778^2 + 12994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1243241291 and 1243241300.

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, 149827 + ... + 157906.

Almost surely, 2^1243241320 is an apocalyptic number.

1243241320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243241320 is an abundant number, since it is smaller than the sum of its proper divisors (1581756800).

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

1243241320 is a wasteful number, since it uses less digits than its factorization.

1243241320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307845 (or 307841 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1243241320 is about 35259.6273377924. The cubic root of 1243241320 is about 1075.2723506806.

Adding to 1243241320 its reverse (231423421), we get a palindrome (1474664741).

The spelling of 1243241320 in words is "one billion, two hundred forty-three million, two hundred forty-one thousand, three hundred twenty".