4257740 has 24 divisors (see below), whose sum is σ = 8981280. Its totient is φ = 1695488.

The previous prime is 4257733. The next prime is 4257749. The reversal of 4257740 is 477524.

It is not an unprimeable number, because it can be changed into a prime (4257749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6884 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (374220).

Almost surely, 2^4257740 is an apocalyptic number.

It is an amenable number.

4257740 is an abundant number, since it is smaller than the sum of its proper divisors (4723540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4257740 is a wasteful number, since it uses less digits than its factorization.

4257740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 959 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 4257740 is about 2063.4291846342. The cubic root of 4257740 is about 162.0788621775.

The spelling of 4257740 in words is "four million, two hundred fifty-seven thousand, seven hundred forty".