126647 has 4 divisors (see below), whose sum is σ = 128160. Its totient is φ = 125136.

The previous prime is 126641. The next prime is 126653. The reversal of 126647 is 746621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746621 = 89 ⋅8389.

It is an interprime number because it is at equal distance from previous prime (126641) and next prime (126653).

It is a cyclic number.

It is not a de Polignac number, because 126647 - 2⁴ = 126631 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623 + ... + 800.

It is an arithmetic number, because the mean of its divisors is an integer number (32040).

2¹²⁶⁶⁴⁷ is an apocalyptic number.

126647 is a deficient number, since it is larger than the sum of its proper divisors (1513).

126647 is an equidigital number, since it uses as much as digits as its factorization.

126647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512.

The product of its digits is 2016, while the sum is 26.

The square root of 126647 is about 355.8749780471. The cubic root of 126647 is about 50.2186425154.

Subtracting from 126647 its sum of digits (26), we obtain a palindrome (126621).

The spelling of 126647 in words is "one hundred twenty-six thousand, six hundred forty-seven".