122420717 has 4 divisors (see below), whose sum is σ = 124427676. Its totient is φ = 120413760.

The previous prime is 122420707. The next prime is 122420729. The reversal of 122420717 is 717024221.

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 51423241 + 70997476 = 7171^2 + 8426^2 .

It is a cyclic number.

It is not a de Polignac number, because 122420717 - 2⁸ = 122420461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122420707) 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, 1003388 + ... + 1003509.

It is an arithmetic number, because the mean of its divisors is an integer number (31106919).

Almost surely, 2^122420717 is an apocalyptic number.

It is an amenable number.

122420717 is a deficient number, since it is larger than the sum of its proper divisors (2006959).

122420717 is an equidigital number, since it uses as much as digits as its factorization.

122420717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006958.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 122420717 is about 11064.3895900316. The cubic root of 122420717 is about 496.5370270076.

Adding to 122420717 its reverse (717024221), we get a palindrome (839444938).

The spelling of 122420717 in words is "one hundred twenty-two million, four hundred twenty thousand, seven hundred seventeen".