42543616 has 20 divisors (see below), whose sum is σ = 85005162. Its totient is φ = 21271552.

The previous prime is 42543581. The next prime is 42543617. The reversal of 42543616 is 61634524.

It can be written as a sum of positive squares in only one way, i.e., 37161216 + 5382400 = 6096^2 + 2320^2 .

It is not an unprimeable number, because it can be changed into a prime (42543617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41035 + ... + 42058.

Almost surely, 2^42543616 is an apocalyptic number.

It is an amenable number.

42543616 is a deficient number, since it is larger than the sum of its proper divisors (42461546).

42543616 is an frugal number, since it uses more digits than its factorization.

42543616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83111 (or 83095 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 42543616 is about 6522.5467418793. The cubic root of 42543616 is about 349.0959416362.

The spelling of 42543616 in words is "forty-two million, five hundred forty-three thousand, six hundred sixteen".