1240442400913 has 2 divisors, whose sum is σ = 1240442400914. Its totient is φ = 1240442400912.

The previous prime is 1240442400863. The next prime is 1240442400919. The reversal of 1240442400913 is 3190042440421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1068767251344 + 171675149569 = 1033812^2 + 414337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240442400913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240442400919) 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 as a sum of consecutive naturals, namely, 620221200456 + 620221200457.

It is an arithmetic number, because the mean of its divisors is an integer number (620221200457).

Almost surely, 2^{1240442400913} is an apocalyptic number.

It is an amenable number.

1240442400913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240442400913 is an equidigital number, since it uses as much as digits as its factorization.

1240442400913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 1240442400913 in words is "one trillion, two hundred forty billion, four hundred forty-two million, four hundred thousand, nine hundred thirteen".