4248921 has 8 divisors (see below), whose sum is σ = 5700640. Its totient is φ = 2814912.

The previous prime is 4248919. The next prime is 4248931. The reversal of 4248921 is 1298424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4248921 - 2¹ = 4248919 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4248901) 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, 3856 + ... + 4833.

It is an arithmetic number, because the mean of its divisors is an integer number (712580).

Almost surely, 2^4248921 is an apocalyptic number.

It is an amenable number.

4248921 is a deficient number, since it is larger than the sum of its proper divisors (1451719).

4248921 is a wasteful number, since it uses less digits than its factorization.

4248921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8855.

The product of its digits is 4608, while the sum is 30.

The square root of 4248921 is about 2061.2911002573. The cubic root of 4248921 is about 161.9668808992.

The spelling of 4248921 in words is "four million, two hundred forty-eight thousand, nine hundred twenty-one".