1240332321409 has 2 divisors, whose sum is σ = 1240332321410. Its totient is φ = 1240332321408.

The previous prime is 1240332321391. The next prime is 1240332321461. The reversal of 1240332321409 is 9041232330421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 943672359184 + 296659962225 = 971428^2 + 544665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240332321409 - 2¹⁵ = 1240332288641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240332322409) 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, 620166160704 + 620166160705.

It is an arithmetic number, because the mean of its divisors is an integer number (620166160705).

Almost surely, 2^{1240332321409} is an apocalyptic number.

It is an amenable number.

1240332321409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240332321409 is an equidigital number, since it uses as much as digits as its factorization.

1240332321409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

It can be divided in two parts, 124033 and 2321409, that added together give a palindrome (2445442).

The spelling of 1240332321409 in words is "one trillion, two hundred forty billion, three hundred thirty-two million, three hundred twenty-one thousand, four hundred nine".