1340441251 has 2 divisors, whose sum is σ = 1340441252. Its totient is φ = 1340441250.

The previous prime is 1340441243. The next prime is 1340441261. The reversal of 1340441251 is 1521440431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340441251 - 2³ = 1340441243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340441231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670220625 + 670220626.

It is an arithmetic number, because the mean of its divisors is an integer number (670220626).

Almost surely, 2^1340441251 is an apocalyptic number.

1340441251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340441251 is an equidigital number, since it uses as much as digits as its factorization.

1340441251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1340441251 is about 36612.0369687347. The cubic root of 1340441251 is about 1102.5947700237.

Adding to 1340441251 its reverse (1521440431), we get a palindrome (2861881682).

The spelling of 1340441251 in words is "one billion, three hundred forty million, four hundred forty-one thousand, two hundred fifty-one".