16642543 has 8 divisors (see below), whose sum is σ = 16997760. Its totient is φ = 16289880.

The previous prime is 16642529. The next prime is 16642573. The reversal of 16642543 is 34524661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16642543 - 2¹³ = 16634351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17896 + ... + 18802.

It is an arithmetic number, because the mean of its divisors is an integer number (2124720).

Almost surely, 2^16642543 is an apocalyptic number.

16642543 is a deficient number, since it is larger than the sum of its proper divisors (355217).

16642543 is an equidigital number, since it uses as much as digits as its factorization.

16642543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277.

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

The square root of 16642543 is about 4079.5273010485. The cubic root of 16642543 is about 255.3131766673.

The spelling of 16642543 in words is "sixteen million, six hundred forty-two thousand, five hundred forty-three".