42306243 has 16 divisors (see below), whose sum is σ = 65684736. Its totient is φ = 23718240.

The previous prime is 42306233. The next prime is 42306247. The reversal of 42306243 is 34260324.

It is a happy number.

It is not a de Polignac number, because 42306243 - 2⁵ = 42306211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42306247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17893 + ... + 20118.

It is an arithmetic number, because the mean of its divisors is an integer number (4105296).

Almost surely, 2^42306243 is an apocalyptic number.

42306243 is a deficient number, since it is larger than the sum of its proper divisors (23378493).

42306243 is a wasteful number, since it uses less digits than its factorization.

42306243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38074.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 42306243 is about 6504.3249457572. The cubic root of 42306243 is about 348.4454676387.

Adding to 42306243 its reverse (34260324), we get a palindrome (76566567).

The spelling of 42306243 in words is "forty-two million, three hundred six thousand, two hundred forty-three".