126668747 has 4 divisors (see below), whose sum is σ = 127635816. Its totient is φ = 125701680.

The previous prime is 126668719. The next prime is 126668749. The reversal of 126668747 is 747866621.

It is a happy number.

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 126668747 - 2²⁰ = 125620171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126668749) 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, 483338 + ... + 483599.

It is an arithmetic number, because the mean of its divisors is an integer number (31908954).

Almost surely, 2^126668747 is an apocalyptic number.

126668747 is a deficient number, since it is larger than the sum of its proper divisors (967069).

126668747 is an equidigital number, since it uses as much as digits as its factorization.

126668747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967068.

The product of its digits is 677376, while the sum is 47.

The square root of 126668747 is about 11254.7210982769. The cubic root of 126668747 is about 502.2151675722.

The spelling of 126668747 in words is "one hundred twenty-six million, six hundred sixty-eight thousand, seven hundred forty-seven".