1340612123 has 2 divisors, whose sum is σ = 1340612124. Its totient is φ = 1340612122.

The previous prime is 1340612111. The next prime is 1340612149. The reversal of 1340612123 is 3212160431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340612123 - 2⁴ = 1340612107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340612723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670306061 + 670306062.

It is an arithmetic number, because the mean of its divisors is an integer number (670306062).

Almost surely, 2^1340612123 is an apocalyptic number.

1340612123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340612123 is an equidigital number, since it uses as much as digits as its factorization.

1340612123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1340612123 is about 36614.3704438571. The cubic root of 1340612123 is about 1102.6416189173.

Adding to 1340612123 its reverse (3212160431), we get a palindrome (4552772554).

The spelling of 1340612123 in words is "one billion, three hundred forty million, six hundred twelve thousand, one hundred twenty-three".