1340442041 has 2 divisors, whose sum is σ = 1340442042. Its totient is φ = 1340442040.

The previous prime is 1340442029. The next prime is 1340442043. The reversal of 1340442041 is 1402440431.

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., 1004636416 + 335805625 = 31696^2 + 18325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340442041 - 2¹⁴ = 1340425657 is a prime.

It is a Sophie Germain prime.

Together with 1340442043, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1340441998 and 1340442016.

It is not a weakly prime, because it can be changed into another prime (1340442043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670221020 + 670221021.

It is an arithmetic number, because the mean of its divisors is an integer number (670221021).

Almost surely, 2^1340442041 is an apocalyptic number.

It is an amenable number.

1340442041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340442041 is an equidigital number, since it uses as much as digits as its factorization.

1340442041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1340442041 is about 36612.0477575347. The cubic root of 1340442041 is about 1102.5949866314.

Adding to 1340442041 its reverse (1402440431), we get a palindrome (2742882472).

The spelling of 1340442041 in words is "one billion, three hundred forty million, four hundred forty-two thousand, forty-one".