1240243431005 has 16 divisors (see below), whose sum is σ = 1553869782144. Its totient is φ = 948524596800.

The previous prime is 1240243430981. The next prime is 1240243431059. The reversal of 1240243431005 is 5001343420421.

It is not a de Polignac number, because 1240243431005 - 2³⁸ = 965365524061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2812046 + ... + 3223055.

It is an arithmetic number, because the mean of its divisors is an integer number (97116861384).

Almost surely, 2^{1240243431005} is an apocalyptic number.

It is an amenable number.

1240243431005 is a deficient number, since it is larger than the sum of its proper divisors (313626351139).

1240243431005 is a wasteful number, since it uses less digits than its factorization.

1240243431005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036916.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 1240243431005 its reverse (5001343420421), we get a palindrome (6241586851426).

The spelling of 1240243431005 in words is "one trillion, two hundred forty billion, two hundred forty-three million, four hundred thirty-one thousand, five".