4243720 has 32 divisors (see below), whose sum is σ = 10284120. Its totient is φ = 1566720.

The previous prime is 4243711. The next prime is 4243721. The reversal of 4243720 is 273424.

It can be written as a sum of positive squares in 4 ways, for example, as 2377764 + 1865956 = 1542^2 + 1366^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4243691 and 4243700.

It is not an unprimeable number, because it can be changed into a prime (4243721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3561 + ... + 4600.

Almost surely, 2^4243720 is an apocalyptic number.

4243720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4243720 is an abundant number, since it is smaller than the sum of its proper divisors (6040400).

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

4243720 is a wasteful number, since it uses less digits than its factorization.

4243720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8185 (or 8181 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 4243720 is about 2060.0291260077. The cubic root of 4243720 is about 161.9007673535.

The spelling of 4243720 in words is "four million, two hundred forty-three thousand, seven hundred twenty".