1340004251 has 2 divisors, whose sum is σ = 1340004252. Its totient is φ = 1340004250.

The previous prime is 1340004223. The next prime is 1340004287. The reversal of 1340004251 is 1524000431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340004251 - 2¹⁰ = 1340003227 is a prime.

It is a super-2 number, since 2×1340004251² = 3591222785396142002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1340034251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670002125 + 670002126.

It is an arithmetic number, because the mean of its divisors is an integer number (670002126).

Almost surely, 2^1340004251 is an apocalyptic number.

1340004251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340004251 is an equidigital number, since it uses as much as digits as its factorization.

1340004251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1340004251 is about 36606.0684996354. The cubic root of 1340004251 is about 1102.4749372734.

Adding to 1340004251 its reverse (1524000431), we get a palindrome (2864004682).

The spelling of 1340004251 in words is "one billion, three hundred forty million, four thousand, two hundred fifty-one".