7428217 has 2 divisors, whose sum is σ = 7428218. Its totient is φ = 7428216.

The previous prime is 7428203. The next prime is 7428227. The reversal of 7428217 is 7128247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5740816 + 1687401 = 2396^2 + 1299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7428217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7428227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3714108 + 3714109.

It is an arithmetic number, because the mean of its divisors is an integer number (3714109).

Almost surely, 2^7428217 is an apocalyptic number.

It is an amenable number.

7428217 is a deficient number, since it is larger than the sum of its proper divisors (1).

7428217 is an equidigital number, since it uses as much as digits as its factorization.

7428217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6272, while the sum is 31.

The square root of 7428217 is about 2725.4755548344. The cubic root of 7428217 is about 195.1168880618.

The spelling of 7428217 in words is "seven million, four hundred twenty-eight thousand, two hundred seventeen".