1340260447 has 8 divisors (see below), whose sum is σ = 1351088480. Its totient is φ = 1329458400.

The previous prime is 1340260391. The next prime is 1340260477. The reversal of 1340260447 is 7440620431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340260447 - 2¹¹ = 1340258399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340260477) 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 in 7 ways as a sum of consecutive naturals, for example, 104629 + ... + 116737.

It is an arithmetic number, because the mean of its divisors is an integer number (168886060).

Almost surely, 2^1340260447 is an apocalyptic number.

1340260447 is a deficient number, since it is larger than the sum of its proper divisors (10828033).

1340260447 is a wasteful number, since it uses less digits than its factorization.

1340260447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12993.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 1340260447 is about 36609.5676975296. The cubic root of 1340260447 is about 1102.5451936849.

Adding to 1340260447 its reverse (7440620431), we get a palindrome (8780880878).

The spelling of 1340260447 in words is "one billion, three hundred forty million, two hundred sixty thousand, four hundred forty-seven".