4243657 has 16 divisors (see below), whose sum is σ = 4898880. Its totient is φ = 3640000.

The previous prime is 4243649. The next prime is 4243667. The reversal of 4243657 is 7563424.

It is a cyclic number.

It is not a de Polignac number, because 4243657 - 2³ = 4243649 is a prime.

It is a d-powerful number, because it can be written as 4⁶ + 2¹⁵ + 4¹¹ + 3⁷ + 6⁵ + 5³ + 7⁴ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4243607) by changing a digit.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16782 + ... + 17032.

It is an arithmetic number, because the mean of its divisors is an integer number (306180).

Almost surely, 2^4243657 is an apocalyptic number.

It is an amenable number.

4243657 is a deficient number, since it is larger than the sum of its proper divisors (655223).

4243657 is a wasteful number, since it uses less digits than its factorization.

4243657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344.

The product of its digits is 20160, while the sum is 31.

The square root of 4243657 is about 2060.0138349050. The cubic root of 4243657 is about 161.8999661855.

It can be divided in two parts, 4243 and 657, that added together give a square (4900 = 70²).

The spelling of 4243657 in words is "four million, two hundred forty-three thousand, six hundred fifty-seven".