126647539 has 2 divisors, whose sum is σ = 126647540. Its totient is φ = 126647538.

The previous prime is 126647537. The next prime is 126647561. The reversal of 126647539 is 935746621.

It is a weak prime.

It is an emirp because it is prime and its reverse (935746621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126647539 - 2¹ = 126647537 is a prime.

Together with 126647537, it forms a pair of twin primes.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 126647495 and 126647504.

It is not a weakly prime, because it can be changed into another prime (126647531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63323769 + 63323770.

It is an arithmetic number, because the mean of its divisors is an integer number (63323770).

Almost surely, 2^126647539 is an apocalyptic number.

126647539 is a deficient number, since it is larger than the sum of its proper divisors (1).

126647539 is an equidigital number, since it uses as much as digits as its factorization.

126647539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 43.

The square root of 126647539 is about 11253.7788764486. The cubic root of 126647539 is about 502.1871375753.

The spelling of 126647539 in words is "one hundred twenty-six million, six hundred forty-seven thousand, five hundred thirty-nine".