4257389 has 4 divisors (see below), whose sum is σ = 4311360. Its totient is φ = 4203420.

The previous prime is 4257371. The next prime is 4257391. The reversal of 4257389 is 9837524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4257389 - 2⁸ = 4257133 is a prime.

It is a super-2 number, since 2×4257389² = 36250722194642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4257359) 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, 26867 + ... + 27024.

It is an arithmetic number, because the mean of its divisors is an integer number (1077840).

Almost surely, 2^4257389 is an apocalyptic number.

It is an amenable number.

4257389 is a deficient number, since it is larger than the sum of its proper divisors (53971).

4257389 is an equidigital number, since it uses as much as digits as its factorization.

4257389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53970.

The product of its digits is 60480, while the sum is 38.

The square root of 4257389 is about 2063.3441302895. The cubic root of 4257389 is about 162.0744082306.

The spelling of 4257389 in words is "four million, two hundred fifty-seven thousand, three hundred eighty-nine".