126550217 has 4 divisors (see below), whose sum is σ = 126755280. Its totient is φ = 126345156.

The previous prime is 126550211. The next prime is 126550267. The reversal of 126550217 is 712055621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126550217 - 2²⁰ = 125501641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126550217.

It is not an unprimeable number, because it can be changed into a prime (126550211) 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 3 ways as a sum of consecutive naturals, for example, 101603 + ... + 102840.

It is an arithmetic number, because the mean of its divisors is an integer number (31688820).

Almost surely, 2^126550217 is an apocalyptic number.

It is an amenable number.

126550217 is a deficient number, since it is larger than the sum of its proper divisors (205063).

126550217 is an equidigital number, since it uses as much as digits as its factorization.

126550217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205062.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 126550217 is about 11249.4540756430. The cubic root of 126550217 is about 502.0584697746.

The spelling of 126550217 in words is "one hundred twenty-six million, five hundred fifty thousand, two hundred seventeen".