4245217 has 2 divisors, whose sum is σ = 4245218. Its totient is φ = 4245216.

The previous prime is 4245209. The next prime is 4245239. The reversal of 4245217 is 7125424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3721041 + 524176 = 1929^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 4245217 - 2³ = 4245209 is a prime.

4245217 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4245191 and 4245200.

It is not a weakly prime, because it can be changed into another prime (4245517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2122608 + 2122609.

It is an arithmetic number, because the mean of its divisors is an integer number (2122609).

Almost surely, 2^4245217 is an apocalyptic number.

It is an amenable number.

4245217 is a deficient number, since it is larger than the sum of its proper divisors (1).

4245217 is an equidigital number, since it uses as much as digits as its factorization.

4245217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 25.

The square root of 4245217 is about 2060.3924383476. The cubic root of 4245217 is about 161.9198023005.

The spelling of 4245217 in words is "four million, two hundred forty-five thousand, two hundred seventeen".