7229857 has 2 divisors, whose sum is σ = 7229858. Its totient is φ = 7229856.

The previous prime is 7229813. The next prime is 7229867. The reversal of 7229857 is 7589227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6990736 + 239121 = 2644^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 7229857 - 2¹⁵ = 7197089 is a prime.

It is not a weakly prime, because it can be changed into another prime (7229867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3614928 + 3614929.

It is an arithmetic number, because the mean of its divisors is an integer number (3614929).

Almost surely, 2^7229857 is an apocalyptic number.

It is an amenable number.

7229857 is a deficient number, since it is larger than the sum of its proper divisors (1).

7229857 is an equidigital number, since it uses as much as digits as its factorization.

7229857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 7229857 is about 2688.8393406821. The cubic root of 7229857 is about 193.3644219394.

It can be divided in two parts, 72 and 29857, that added together give a square (29929 = 173²).

The spelling of 7229857 in words is "seven million, two hundred twenty-nine thousand, eight hundred fifty-seven".