4245523 has 4 divisors (see below), whose sum is σ = 4283208. Its totient is φ = 4207840.

The previous prime is 4245517. The next prime is 4245541. The reversal of 4245523 is 3255424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4245523 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 2¹¹ + 4¹¹ + 5 + 5 + 2¹⁵ + 3² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4245623) 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 3 ways as a sum of consecutive naturals, for example, 18673 + ... + 18898.

It is an arithmetic number, because the mean of its divisors is an integer number (1070802).

Almost surely, 2^4245523 is an apocalyptic number.

4245523 is a deficient number, since it is larger than the sum of its proper divisors (37685).

4245523 is a wasteful number, since it uses less digits than its factorization.

4245523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37684.

The product of its digits is 4800, while the sum is 25.

The square root of 4245523 is about 2060.4666947078. The cubic root of 4245523 is about 161.9236926607.

Subtracting from 4245523 its reverse (3255424), we obtain a palindrome (990099).

The spelling of 4245523 in words is "four million, two hundred forty-five thousand, five hundred twenty-three".