4242820 has 12 divisors (see below), whose sum is σ = 8909964. Its totient is φ = 1697120.

The previous prime is 4242781. The next prime is 4242829. The reversal of 4242820 is 282424.

It can be written as a sum of positive squares in 2 ways, for example, as 2414916 + 1827904 = 1554^2 + 1352^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4242791 and 4242800.

It is not an unprimeable number, because it can be changed into a prime (4242829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106051 + ... + 106090.

It is an arithmetic number, because the mean of its divisors is an integer number (742497).

Almost surely, 2^4242820 is an apocalyptic number.

It is an amenable number.

4242820 is an abundant number, since it is smaller than the sum of its proper divisors (4667144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4242820 is a wasteful number, since it uses less digits than its factorization.

4242820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212150 (or 212148 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4242820 is about 2059.8106709113. The cubic root of 4242820 is about 161.8893213429.

The spelling of 4242820 in words is "four million, two hundred forty-two thousand, eight hundred twenty".