1239623041 has 4 divisors (see below), whose sum is σ = 1243583812. Its totient is φ = 1235662272.

The previous prime is 1239623039. The next prime is 1239623081. The reversal of 1239623041 is 1403269321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 316982416 + 922640625 = 17804^2 + 30375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1239623041 - 2¹ = 1239623039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1239622994 and 1239623012.

It is not an unprimeable number, because it can be changed into a prime (1239623081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1979916 + ... + 1980541.

It is an arithmetic number, because the mean of its divisors is an integer number (310895953).

Almost surely, 2^1239623041 is an apocalyptic number.

It is an amenable number.

1239623041 is a deficient number, since it is larger than the sum of its proper divisors (3960771).

1239623041 is an equidigital number, since it uses as much as digits as its factorization.

1239623041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960770.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1239623041 is about 35208.2808583435. The cubic root of 1239623041 is about 1074.2281940877.

The spelling of 1239623041 in words is "one billion, two hundred thirty-nine million, six hundred twenty-three thousand, forty-one".