4257641 has 2 divisors, whose sum is σ = 4257642. Its totient is φ = 4257640.

The previous prime is 4257613. The next prime is 4257647. The reversal of 4257641 is 1467524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4080400 + 177241 = 2020^2 + 421^2 .

It is a cyclic number.

It is not a de Polignac number, because 4257641 - 2¹⁰ = 4256617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4257647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2128820 + 2128821.

It is an arithmetic number, because the mean of its divisors is an integer number (2128821).

Almost surely, 2^4257641 is an apocalyptic number.

It is an amenable number.

4257641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4257641 is an equidigital number, since it uses as much as digits as its factorization.

4257641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 4257641 is about 2063.4051953022. The cubic root of 4257641 is about 162.0776059608.

The spelling of 4257641 in words is "four million, two hundred fifty-seven thousand, six hundred forty-one".