1231244320 has 48 divisors (see below), whose sum is σ = 2912050008. Its totient is φ = 491950080.

The previous prime is 1231244317. The next prime is 1231244321. The reversal of 1231244320 is 234421321.

It can be written as a sum of positive squares in 4 ways, for example, as 991242256 + 240002064 = 31484^2 + 15492^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1231244291 and 1231244300.

It is not an unprimeable number, because it can be changed into a prime (1231244321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159592 + ... + 167128.

Almost surely, 2^1231244320 is an apocalyptic number.

1231244320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231244320 is an abundant number, since it is smaller than the sum of its proper divisors (1680805688).

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

1231244320 is a wasteful number, since it uses less digits than its factorization.

1231244320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8573 (or 8565 counting only the distinct ones).

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

The square root of 1231244320 is about 35089.0911823034. The cubic root of 1231244320 is about 1071.8024530171.

Adding to 1231244320 its reverse (234421321), we get a palindrome (1465665641).

The spelling of 1231244320 in words is "one billion, two hundred thirty-one million, two hundred forty-four thousand, three hundred twenty".