4257857 has 4 divisors (see below), whose sum is σ = 4300116. Its totient is φ = 4215600.

The previous prime is 4257833. The next prime is 4257889. The reversal of 4257857 is 7587524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2660161 + 1597696 = 1631^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 4257857 - 2¹⁸ = 3995713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4257857.

It is not an unprimeable number, because it can be changed into a prime (4257557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20978 + ... + 21179.

It is an arithmetic number, because the mean of its divisors is an integer number (1075029).

Almost surely, 2^4257857 is an apocalyptic number.

It is an amenable number.

4257857 is a deficient number, since it is larger than the sum of its proper divisors (42259).

4257857 is a wasteful number, since it uses less digits than its factorization.

4257857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42258.

The product of its digits is 78400, while the sum is 38.

The square root of 4257857 is about 2063.4575353033. The cubic root of 4257857 is about 162.0803467721.

The spelling of 4257857 in words is "four million, two hundred fifty-seven thousand, eight hundred fifty-seven".