126221017 has 8 divisors (see below), whose sum is σ = 138159560. Its totient is φ = 114600960.

The previous prime is 126221003. The next prime is 126221059. The reversal of 126221017 is 710122621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22099401 + 104121616 = 4701^2 + 10204^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126221017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126221087) 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 7 ways as a sum of consecutive naturals, for example, 78792 + ... + 80377.

It is an arithmetic number, because the mean of its divisors is an integer number (17269945).

Almost surely, 2^126221017 is an apocalyptic number.

It is an amenable number.

126221017 is a deficient number, since it is larger than the sum of its proper divisors (11938543).

126221017 is a wasteful number, since it uses less digits than its factorization.

126221017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159243.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 126221017 is about 11234.8127265211. The cubic root of 126221017 is about 501.6227503318.

Adding to 126221017 its reverse (710122621), we get a palindrome (836343638).

The spelling of 126221017 in words is "one hundred twenty-six million, two hundred twenty-one thousand, seventeen".