4257945 has 12 divisors (see below), whose sum is σ = 7380516. Its totient is φ = 2270880.

The previous prime is 4257937. The next prime is 4257949. The reversal of 4257945 is 5497524.

4257945 is a `hidden beast` number, since 42 + 579 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 831744 + 3426201 = 912^2 + 1851^2 .

It is not a de Polignac number, because 4257945 - 2³ = 4257937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4257949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47266 + ... + 47355.

It is an arithmetic number, because the mean of its divisors is an integer number (615043).

Almost surely, 2^4257945 is an apocalyptic number.

4257945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4257945 is a deficient number, since it is larger than the sum of its proper divisors (3122571).

4257945 is a wasteful number, since it uses less digits than its factorization.

4257945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94632 (or 94629 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 4257945 is about 2063.4788586269. The cubic root of 4257945 is about 162.0814633723.

It can be divided in two parts, 42579 and 45, that added together give a palindrome (42624).

The spelling of 4257945 in words is "four million, two hundred fifty-seven thousand, nine hundred forty-five".