127261365243 has 4 divisors (see below), whose sum is σ = 169681820328. Its totient is φ = 84840910160.

The previous prime is 127261365241. The next prime is 127261365269. The reversal of 127261365243 is 342563162721.

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 127261365243 - 2¹ = 127261365241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 127261365195 and 127261365204.

It is not an unprimeable number, because it can be changed into a prime (127261365241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21210227538 + ... + 21210227543.

It is an arithmetic number, because the mean of its divisors is an integer number (42420455082).

Almost surely, 2^127261365243 is an apocalyptic number.

127261365243 is a deficient number, since it is larger than the sum of its proper divisors (42420455085).

127261365243 is an equidigital number, since it uses as much as digits as its factorization.

127261365243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42420455084.

The product of its digits is 362880, while the sum is 42.

The spelling of 127261365243 in words is "one hundred twenty-seven billion, two hundred sixty-one million, three hundred sixty-five thousand, two hundred forty-three".