122566217 has 4 divisors (see below), whose sum is σ = 122602116. Its totient is φ = 122530320.

The previous prime is 122566181. The next prime is 122566229. The reversal of 122566217 is 712665221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117917881 + 4648336 = 10859^2 + 2156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122566217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122566117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12218 + ... + 19859.

It is an arithmetic number, because the mean of its divisors is an integer number (30650529).

Almost surely, 2^122566217 is an apocalyptic number.

It is an amenable number.

122566217 is a deficient number, since it is larger than the sum of its proper divisors (35899).

122566217 is an equidigital number, since it uses as much as digits as its factorization.

122566217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35898.

The product of its digits is 10080, while the sum is 32.

The square root of 122566217 is about 11070.9627855937. The cubic root of 122566217 is about 496.7336645702.

The spelling of 122566217 in words is "one hundred twenty-two million, five hundred sixty-six thousand, two hundred seventeen".