1230240043 has 4 divisors (see below), whose sum is σ = 1231673080. Its totient is φ = 1228807008.

The previous prime is 1230240041. The next prime is 1230240083. The reversal of 1230240043 is 3400420321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1230240043 - 2¹ = 1230240041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230240043.

It is not an unprimeable number, because it can be changed into a prime (1230240041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715230 + ... + 716947.

It is an arithmetic number, because the mean of its divisors is an integer number (307918270).

Almost surely, 2^1230240043 is an apocalyptic number.

1230240043 is a deficient number, since it is larger than the sum of its proper divisors (1433037).

1230240043 is an equidigital number, since it uses as much as digits as its factorization.

1230240043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433036.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1230240043 is about 35074.7778752767. Note that the first 3 decimals coincide. The cubic root of 1230240043 is about 1071.5109648798.

Adding to 1230240043 its reverse (3400420321), we get a palindrome (4630660364).

The spelling of 1230240043 in words is "one billion, two hundred thirty million, two hundred forty thousand, forty-three".