4249521 has 12 divisors (see below), whose sum is σ = 6461520. Its totient is φ = 2683800.

The previous prime is 4249513. The next prime is 4249523. The reversal of 4249521 is 1259424.

It is not a de Polignac number, because 4249521 - 2³ = 4249513 is a prime.

4249521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4249523) 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 11 ways as a sum of consecutive naturals, for example, 12255 + ... + 12596.

It is an arithmetic number, because the mean of its divisors is an integer number (538460).

Almost surely, 2^4249521 is an apocalyptic number.

It is an amenable number.

4249521 is a deficient number, since it is larger than the sum of its proper divisors (2211999).

4249521 is a wasteful number, since it uses less digits than its factorization.

4249521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24876 (or 24873 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 4249521 is about 2061.4366349709. The cubic root of 4249521 is about 161.9745044468.

The spelling of 4249521 in words is "four million, two hundred forty-nine thousand, five hundred twenty-one".