1240041552401 has 2 divisors, whose sum is σ = 1240041552402. Its totient is φ = 1240041552400.

The previous prime is 1240041552331. The next prime is 1240041552403. The reversal of 1240041552401 is 1042551400421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1165935646225 + 74105906176 = 1079785^2 + 272224^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240041552401 - 2²⁶ = 1239974443537 is a prime.

Together with 1240041552403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1240041552403) 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 as a sum of consecutive naturals, namely, 620020776200 + 620020776201.

It is an arithmetic number, because the mean of its divisors is an integer number (620020776201).

Almost surely, 2^{1240041552401} is an apocalyptic number.

It is an amenable number.

1240041552401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240041552401 is an equidigital number, since it uses as much as digits as its factorization.

1240041552401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 1240041552401 its reverse (1042551400421), we get a palindrome (2282592952822).

The spelling of 1240041552401 in words is "one trillion, two hundred forty billion, forty-one million, five hundred fifty-two thousand, four hundred one".