4243540 has 48 divisors (see below), whose sum is σ = 10789632. Its totient is φ = 1368576.

The previous prime is 4243529. The next prime is 4243543. The reversal of 4243540 is 453424.

It is a happy number.

4243540 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1489 + ... + 3271.

It is an arithmetic number, because the mean of its divisors is an integer number (224784).

Almost surely, 2^4243540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4243540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5394816).

4243540 is an abundant number, since it is smaller than the sum of its proper divisors (6546092).

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

4243540 is a wasteful number, since it uses less digits than its factorization.

4243540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816 (or 1814 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 4243540 is about 2059.9854368417. The cubic root of 4243540 is about 161.8984782809.

Adding to 4243540 its reverse (453424), we get a palindrome (4696964).

The spelling of 4243540 in words is "four million, two hundred forty-three thousand, five hundred forty".