4239457 has 2 divisors, whose sum is σ = 4239458. Its totient is φ = 4239456.

The previous prime is 4239449. The next prime is 4239463. The reversal of 4239457 is 7549324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4227136 + 12321 = 2056^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 4239457 - 2³ = 4239449 is a prime.

It is not a weakly prime, because it can be changed into another prime (4239857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2119728 + 2119729.

It is an arithmetic number, because the mean of its divisors is an integer number (2119729).

Almost surely, 2^4239457 is an apocalyptic number.

It is an amenable number.

4239457 is a deficient number, since it is larger than the sum of its proper divisors (1).

4239457 is an equidigital number, since it uses as much as digits as its factorization.

4239457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 4239457 is about 2058.9941719199. The cubic root of 4239457 is about 161.8465370865.

The spelling of 4239457 in words is "four million, two hundred thirty-nine thousand, four hundred fifty-seven".