1272432543373 has 4 divisors (see below), whose sum is σ = 1275384823488. Its totient is φ = 1269480263260.

The previous prime is 1272432543353. The next prime is 1272432543377. The reversal of 1272432543373 is 3733452342721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1272432543373 - 2⁹ = 1272432542861 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 (1272432543377) 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, 1476139411 + ... + 1476140272.

It is an arithmetic number, because the mean of its divisors is an integer number (318846205872).

Almost surely, 2^{1272432543373} is an apocalyptic number.

It is an amenable number.

1272432543373 is a deficient number, since it is larger than the sum of its proper divisors (2952280115).

1272432543373 is an equidigital number, since it uses as much as digits as its factorization.

1272432543373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952280114.

The product of its digits is 2540160, while the sum is 46.

The spelling of 1272432543373 in words is "one trillion, two hundred seventy-two billion, four hundred thirty-two million, five hundred forty-three thousand, three hundred seventy-three".