201242417 has 2 divisors, whose sum is σ = 201242418. Its totient is φ = 201242416.

The previous prime is 201242407. The next prime is 201242441. The reversal of 201242417 is 714242102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195748081 + 5494336 = 13991^2 + 2344^2 .

It is a cyclic number.

It is not a de Polignac number, because 201242417 - 2⁴ = 201242401 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 201242392 and 201242401.

It is not a weakly prime, because it can be changed into another prime (201242407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100621208 + 100621209.

It is an arithmetic number, because the mean of its divisors is an integer number (100621209).

Almost surely, 2^201242417 is an apocalyptic number.

It is an amenable number.

201242417 is a deficient number, since it is larger than the sum of its proper divisors (1).

201242417 is an equidigital number, since it uses as much as digits as its factorization.

201242417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 201242417 is about 14185.9936909615. The cubic root of 201242417 is about 586.0119985351.

Adding to 201242417 its reverse (714242102), we get a palindrome (915484519).

The spelling of 201242417 in words is "two hundred one million, two hundred forty-two thousand, four hundred seventeen".