4257109 has 4 divisors (see below), whose sum is σ = 4372204. Its totient is φ = 4142016.

The previous prime is 4257101. The next prime is 4257131. The reversal of 4257109 is 9017524.

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 2022084 + 2235025 = 1422^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 4257109 - 2³ = 4257101 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4257101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57492 + ... + 57565.

It is an arithmetic number, because the mean of its divisors is an integer number (1093051).

Almost surely, 2^4257109 is an apocalyptic number.

It is an amenable number.

4257109 is a deficient number, since it is larger than the sum of its proper divisors (115095).

4257109 is a wasteful number, since it uses less digits than its factorization.

4257109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115094.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 4257109 is about 2063.2762781557. The cubic root of 4257109 is about 162.0708550489.

The spelling of 4257109 in words is "four million, two hundred fifty-seven thousand, one hundred nine".