1240442401427 has 2 divisors, whose sum is σ = 1240442401428. Its totient is φ = 1240442401426.

The previous prime is 1240442401357. The next prime is 1240442401459. The reversal of 1240442401427 is 7241042440421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1240442401427 - 2³² = 1236147434131 is a prime.

It is a super-2 number, since 2×1240442401427² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1240442400427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620221200713 + 620221200714.

It is an arithmetic number, because the mean of its divisors is an integer number (620221200714).

Almost surely, 2^{1240442401427} is an apocalyptic number.

1240442401427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240442401427 is an equidigital number, since it uses as much as digits as its factorization.

1240442401427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57344, while the sum is 35.

Adding to 1240442401427 its reverse (7241042440421), we get a palindrome (8481484841848).

The spelling of 1240442401427 in words is "one trillion, two hundred forty billion, four hundred forty-two million, four hundred one thousand, four hundred twenty-seven".