100542543 has 4 divisors (see below), whose sum is σ = 134056728. Its totient is φ = 67028360.

The previous prime is 100542527. The next prime is 100542551. The reversal of 100542543 is 345245001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100542543 - 2⁴ = 100542527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100542553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16757088 + ... + 16757093.

It is an arithmetic number, because the mean of its divisors is an integer number (33514182).

Almost surely, 2^100542543 is an apocalyptic number.

100542543 is a deficient number, since it is larger than the sum of its proper divisors (33514185).

100542543 is an equidigital number, since it uses as much as digits as its factorization.

100542543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33514184.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 100542543 is about 10027.0904553614. The cubic root of 100542543 is about 464.9967903582.

Adding to 100542543 its reverse (345245001), we get a palindrome (445787544).

The spelling of 100542543 in words is "one hundred million, five hundred forty-two thousand, five hundred forty-three".