1312240403143 has 4 divisors (see below), whose sum is σ = 1312280478648. Its totient is φ = 1312200327640.

The previous prime is 1312240403141. The next prime is 1312240403147. The reversal of 1312240403143 is 3413040422131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1312240403143 - 2¹ = 1312240403141 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 (1312240403141) 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, 19988596 + ... + 20054137.

It is an arithmetic number, because the mean of its divisors is an integer number (328070119662).

Almost surely, 2^{1312240403143} is an apocalyptic number.

1312240403143 is a deficient number, since it is larger than the sum of its proper divisors (40075505).

1312240403143 is an equidigital number, since it uses as much as digits as its factorization.

1312240403143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40075504.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1312240403143 its reverse (3413040422131), we get a palindrome (4725280825274).

The spelling of 1312240403143 in words is "one trillion, three hundred twelve billion, two hundred forty million, four hundred three thousand, one hundred forty-three".