1340425747 has 2 divisors, whose sum is σ = 1340425748. Its totient is φ = 1340425746.

The previous prime is 1340425739. The next prime is 1340425777. The reversal of 1340425747 is 7475240431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340425747 - 2³ = 1340425739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340425777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670212873 + 670212874.

It is an arithmetic number, because the mean of its divisors is an integer number (670212874).

Almost surely, 2^1340425747 is an apocalyptic number.

1340425747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340425747 is an equidigital number, since it uses as much as digits as its factorization.

1340425747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 1340425747 is about 36611.8252344785. The cubic root of 1340425747 is about 1102.5905190118.

The spelling of 1340425747 in words is "one billion, three hundred forty million, four hundred twenty-five thousand, seven hundred forty-seven".