1240423400043 has 16 divisors (see below), whose sum is σ = 1839592628640. Its totient is φ = 826081183872.

The previous prime is 1240423399961. The next prime is 1240423400053. The reversal of 1240423400043 is 3400043240421.

It is a happy number.

1240423400043 is a `hidden beast` number, since 1 + 240 + 42 + 340 + 0 + 0 + 43 = 666.

It is not a de Polignac number, because 1240423400043 - 2⁹ = 1240423399531 is a prime.

It is a super-2 number, since 2×1240423400043² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1240423400053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24077946 + ... + 24129407.

It is an arithmetic number, because the mean of its divisors is an integer number (114974539290).

Almost surely, 2^{1240423400043} is an apocalyptic number.

1240423400043 is a deficient number, since it is larger than the sum of its proper divisors (599169228597).

1240423400043 is an equidigital number, since it uses as much as digits as its factorization.

1240423400043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48208315 (or 48208309 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 1240423400043 its reverse (3400043240421), we get a palindrome (4640466640464).

The spelling of 1240423400043 in words is "one trillion, two hundred forty billion, four hundred twenty-three million, four hundred thousand, forty-three".