126563647 has 4 divisors (see below), whose sum is σ = 144644176. Its totient is φ = 108483120.

The previous prime is 126563599. The next prime is 126563651. The reversal of 126563647 is 746365621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746365621 = 2029 ⋅367849.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126563647 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 (126563747) 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 in 3 ways as a sum of consecutive naturals, for example, 9040254 + ... + 9040267.

It is an arithmetic number, because the mean of its divisors is an integer number (36161044).

Almost surely, 2^126563647 is an apocalyptic number.

126563647 is a deficient number, since it is larger than the sum of its proper divisors (18080529).

126563647 is an equidigital number, since it uses as much as digits as its factorization.

126563647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18080528.

The product of its digits is 181440, while the sum is 40.

The square root of 126563647 is about 11250.0509776623. The cubic root of 126563647 is about 502.0762292772.

The spelling of 126563647 in words is "one hundred twenty-six million, five hundred sixty-three thousand, six hundred forty-seven".