126805272439 has 4 divisors (see below), whose sum is σ = 127099484640. Its totient is φ = 126511060240.

The previous prime is 126805272437. The next prime is 126805272457. The reversal of 126805272439 is 934272508621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934272508621 = 1303 ⋅717016507.

It is a cyclic number.

It is not a de Polignac number, because 126805272439 - 2¹ = 126805272437 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126805272392 and 126805272401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126805272437) 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, 147105454 + ... + 147106315.

It is an arithmetic number, because the mean of its divisors is an integer number (31774871160).

It is a 1-persistent number, because it is pandigital, but 2⋅126805272439 = 253610544878 is not.

Almost surely, 2^126805272439 is an apocalyptic number.

126805272439 is a deficient number, since it is larger than the sum of its proper divisors (294212201).

126805272439 is an equidigital number, since it uses as much as digits as its factorization.

126805272439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294212200.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 126805272439 in words is "one hundred twenty-six billion, eight hundred five million, two hundred seventy-two thousand, four hundred thirty-nine".