126417 has 4 divisors (see below), whose sum is σ = 168560. Its totient is φ = 84276.

The previous prime is 126397. The next prime is 126421. The reversal of 126417 is 714621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 714621 = 3 ⋅238207.

It is not a de Polignac number, because 126417 - 2¹² = 122321 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126393 and 126402.

It is not an unprimeable number, because it can be changed into a prime (126457) 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, 21067 + ... + 21072.

It is an arithmetic number, because the mean of its divisors is an integer number (42140).

2¹²⁶⁴¹⁷ is an apocalyptic number.

It is an amenable number.

126417 is a deficient number, since it is larger than the sum of its proper divisors (42143).

126417 is an equidigital number, since it uses as much as digits as its factorization.

126417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42142.

The product of its digits is 336, while the sum is 21.

The square root of 126417 is about 355.5516840067. The cubic root of 126417 is about 50.1882238796.

The spelling of 126417 in words is "one hundred twenty-six thousand, four hundred seventeen".