4246821 has 24 divisors (see below), whose sum is σ = 6663384. Its totient is φ = 2595840.

The previous prime is 4246819. The next prime is 4246831. The reversal of 4246821 is 1286424.

It can be written as a sum of positive squares in 4 ways, for example, as 1404225 + 2842596 = 1185^2 + 1686^2 .

It is not a de Polignac number, because 4246821 - 2¹ = 4246819 is a prime.

4246821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4246831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5935 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (277641).

Almost surely, 2^4246821 is an apocalyptic number.

4246821 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4246821 is a deficient number, since it is larger than the sum of its proper divisors (2416563).

4246821 is a wasteful number, since it uses less digits than its factorization.

4246821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 738 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 4246821 is about 2060.7816478220. The cubic root of 4246821 is about 161.9401928294.

The spelling of 4246821 in words is "four million, two hundred forty-six thousand, eight hundred twenty-one".