1231041320 has 16 divisors (see below), whose sum is σ = 2769843060. Its totient is φ = 492416512.

The previous prime is 1231041307. The next prime is 1231041379. The reversal of 1231041320 is 231401321.

It can be written as a sum of positive squares in 2 ways, for example, as 1231027396 + 13924 = 35086^2 + 118^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15387977 + ... + 15388056.

Almost surely, 2^1231041320 is an apocalyptic number.

1231041320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231041320 is an abundant number, since it is smaller than the sum of its proper divisors (1538801740).

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

1231041320 is a wasteful number, since it uses less digits than its factorization.

1231041320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30776044 (or 30776040 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1231041320 is about 35086.1984261618. The cubic root of 1231041320 is about 1071.7435457114.

Adding to 1231041320 its reverse (231401321), we get a palindrome (1462442641).

The spelling of 1231041320 in words is "one billion, two hundred thirty-one million, forty-one thousand, three hundred twenty".