1340424240431 has 4 divisors (see below), whose sum is σ = 1353438068112. Its totient is φ = 1327410412752.

The previous prime is 1340424240403. The next prime is 1340424240439.

1340424240431 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340424240431 is a prime.

It is a super-2 number, since 2×1340424240431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340424240439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6506913686 + ... + 6506913891.

It is an arithmetic number, because the mean of its divisors is an integer number (338359517028).

Almost surely, 2^{1340424240431} is an apocalyptic number.

1340424240431 is a deficient number, since it is larger than the sum of its proper divisors (13013827681).

1340424240431 is a wasteful number, since it uses less digits than its factorization.

1340424240431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13013827680.

The product of its (nonzero) digits is 36864, while the sum is 32.

The spelling of 1340424240431 in words is "one trillion, three hundred forty billion, four hundred twenty-four million, two hundred forty thousand, four hundred thirty-one".