1240432123939 has 2 divisors, whose sum is σ = 1240432123940. Its totient is φ = 1240432123938.

The previous prime is 1240432123937. The next prime is 1240432124059. The reversal of 1240432123939 is 9393212340421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240432123939 - 2¹ = 1240432123937 is a prime.

Together with 1240432123937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1240432123895 and 1240432123904.

It is not a weakly prime, because it can be changed into another prime (1240432123937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620216061969 + 620216061970.

It is an arithmetic number, because the mean of its divisors is an integer number (620216061970).

Almost surely, 2^{1240432123939} is an apocalyptic number.

1240432123939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240432123939 is an equidigital number, since it uses as much as digits as its factorization.

1240432123939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 1240432123939 in words is "one trillion, two hundred forty billion, four hundred thirty-two million, one hundred twenty-three thousand, nine hundred thirty-nine".