1340404259 has 2 divisors, whose sum is σ = 1340404260. Its totient is φ = 1340404258.

The previous prime is 1340404237. The next prime is 1340404271. The reversal of 1340404259 is 9524040431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1340404259 - 2²⁰ = 1339355683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340404159) 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, 670202129 + 670202130.

It is an arithmetic number, because the mean of its divisors is an integer number (670202130).

Almost surely, 2^1340404259 is an apocalyptic number.

1340404259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340404259 is an equidigital number, since it uses as much as digits as its factorization.

1340404259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1340404259 is about 36611.5317762041. The cubic root of 1340404259 is about 1102.5846272042.

The spelling of 1340404259 in words is "one billion, three hundred forty million, four hundred four thousand, two hundred fifty-nine".