1240442401357 has 2 divisors, whose sum is σ = 1240442401358. Its totient is φ = 1240442401356.

The previous prime is 1240442401333. The next prime is 1240442401427. The reversal of 1240442401357 is 7531042440421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 758203821001 + 482238580356 = 870749^2 + 694434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240442401357 - 2²⁷ = 1240308183629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240442431357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620221200678 + 620221200679.

It is an arithmetic number, because the mean of its divisors is an integer number (620221200679).

Almost surely, 2^{1240442401357} is an apocalyptic number.

It is an amenable number.

1240442401357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240442401357 is an equidigital number, since it uses as much as digits as its factorization.

1240442401357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 37.

Adding to 1240442401357 its reverse (7531042440421), we get a palindrome (8771484841778).

The spelling of 1240442401357 in words is "one trillion, two hundred forty billion, four hundred forty-two million, four hundred one thousand, three hundred fifty-seven".