43242730 has 16 divisors (see below), whose sum is σ = 82415880. Its totient is φ = 16279552.

The previous prime is 43242709. The next prime is 43242739. The reversal of 43242730 is 3724234.

It can be written as a sum of positive squares in 4 ways, for example, as 38675961 + 4566769 = 6219^2 + 2137^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43242695 and 43242704.

It is not an unprimeable number, because it can be changed into a prime (43242739) 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, 127015 + ... + 127354.

Almost surely, 2^43242730 is an apocalyptic number.

43242730 is a deficient number, since it is larger than the sum of its proper divisors (39173150).

43242730 is a wasteful number, since it uses less digits than its factorization.

43242730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254393.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 43242730 is about 6575.9204678889. The cubic root of 43242730 is about 350.9977786836.

Adding to 43242730 its reverse (3724234), we get a palindrome (46966964).

The spelling of 43242730 in words is "forty-three million, two hundred forty-two thousand, seven hundred thirty".