126617643 has 12 divisors (see below), whose sum is σ = 183030120. Its totient is φ = 84348096.

The previous prime is 126617641. The next prime is 126617677. The reversal of 126617643 is 346716621.

It is a happy number.

126617643 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 1 + 7 + 643 = 666.

It is not a de Polignac number, because 126617643 - 2¹ = 126617641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126617598 and 126617607.

It is not an unprimeable number, because it can be changed into a prime (126617641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9448 + ... + 18506.

It is an arithmetic number, because the mean of its divisors is an integer number (15252510).

Almost surely, 2^126617643 is an apocalyptic number.

126617643 is a deficient number, since it is larger than the sum of its proper divisors (56412477).

126617643 is a wasteful number, since it uses less digits than its factorization.

126617643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10618 (or 10615 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 126617643 is about 11252.4505331061. The cubic root of 126617643 is about 502.1476195864.

It can be divided in two parts, 126617 and 643, that added together give a triangular number (127260 = T₅₀₄).

The spelling of 126617643 in words is "one hundred twenty-six million, six hundred seventeen thousand, six hundred forty-three".