1340420420413 has 2 divisors, whose sum is σ = 1340420420414. Its totient is φ = 1340420420412.

The previous prime is 1340420420407. The next prime is 1340420420429. The reversal of 1340420420413 is 3140240240431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1143663414084 + 196757006329 = 1069422^2 + 443573^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340420420413 - 2³⁷ = 1202981466941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340420420473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670210210206 + 670210210207.

It is an arithmetic number, because the mean of its divisors is an integer number (670210210207).

Almost surely, 2^{1340420420413} is an apocalyptic number.

It is an amenable number.

1340420420413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340420420413 is an equidigital number, since it uses as much as digits as its factorization.

1340420420413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1340420420413 its reverse (3140240240431), we get a palindrome (4480660660844).

The spelling of 1340420420413 in words is "one trillion, three hundred forty billion, four hundred twenty million, four hundred twenty thousand, four hundred thirteen".