1230239005 has 4 divisors (see below), whose sum is σ = 1476286812. Its totient is φ = 984191200.

The previous prime is 1230238991. The next prime is 1230239009. The reversal of 1230239005 is 5009320321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5009320321 = 787 ⋅6365083.

It can be written as a sum of positive squares in 2 ways, for example, as 337603876 + 892635129 = 18374^2 + 29877^2 .

It is not a de Polignac number, because 1230239005 - 2¹¹ = 1230236957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230239009) 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, 123023896 + ... + 123023905.

It is an arithmetic number, because the mean of its divisors is an integer number (369071703).

Almost surely, 2^1230239005 is an apocalyptic number.

It is an amenable number.

1230239005 is a deficient number, since it is larger than the sum of its proper divisors (246047807).

1230239005 is an equidigital number, since it uses as much as digits as its factorization.

1230239005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246047806.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1230239005 is about 35074.7630783160. The cubic root of 1230239005 is about 1071.5106635216.

Adding to 1230239005 its reverse (5009320321), we get a palindrome (6239559326).

The spelling of 1230239005 in words is "one billion, two hundred thirty million, two hundred thirty-nine thousand, five".