4257685 has 4 divisors (see below), whose sum is σ = 5109228. Its totient is φ = 3406144.

The previous prime is 4257679. The next prime is 4257697. The reversal of 4257685 is 5867524.

It is a happy number.

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 439569 + 3818116 = 663^2 + 1954^2 .

It is a cyclic number.

It is not a de Polignac number, because 4257685 - 2³ = 4257677 is a prime.

It is a d-powerful number, because it can be written as 4⁵ + 2²² + 5 + 7 + 6⁶ + 8² + 5⁶ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425764 + ... + 425773.

It is an arithmetic number, because the mean of its divisors is an integer number (1277307).

Almost surely, 2^4257685 is an apocalyptic number.

It is an amenable number.

4257685 is a deficient number, since it is larger than the sum of its proper divisors (851543).

4257685 is an equidigital number, since it uses as much as digits as its factorization.

4257685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851542.

The product of its digits is 67200, while the sum is 37.

The square root of 4257685 is about 2063.4158572619. The cubic root of 4257685 is about 162.0781642817.

The spelling of 4257685 in words is "four million, two hundred fifty-seven thousand, six hundred eighty-five".