1340424451 has 2 divisors, whose sum is σ = 1340424452. Its totient is φ = 1340424450.

The previous prime is 1340424403. The next prime is 1340424497. The reversal of 1340424451 is 1544240431.

It is a strong prime.

It is an emirp because it is prime and its reverse (1544240431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340424451 - 2¹⁵ = 1340391683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340424401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670212225 + 670212226.

It is an arithmetic number, because the mean of its divisors is an integer number (670212226).

Almost surely, 2^1340424451 is an apocalyptic number.

1340424451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340424451 is an equidigital number, since it uses as much as digits as its factorization.

1340424451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1340424451 is about 36611.8075352747. The cubic root of 1340424451 is about 1102.5901636625.

Adding to 1340424451 its reverse (1544240431), we get a palindrome (2884664882).

The spelling of 1340424451 in words is "one billion, three hundred forty million, four hundred twenty-four thousand, four hundred fifty-one".