100542503 has 4 divisors (see below), whose sum is σ = 100579008. Its totient is φ = 100506000.

The previous prime is 100542473. The next prime is 100542511. The reversal of 100542503 is 305245001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305245001 = 2797 ⋅109133.

It is a cyclic number.

It is not a de Polignac number, because 100542503 - 2⁶ = 100542439 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 (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, 13751 + ... + 19752.

It is an arithmetic number, because the mean of its divisors is an integer number (25144752).

Almost surely, 2^100542503 is an apocalyptic number.

100542503 is a deficient number, since it is larger than the sum of its proper divisors (36505).

100542503 is an equidigital number, since it uses as much as digits as its factorization.

100542503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36504.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 100542503 is about 10027.0884607647. The cubic root of 100542503 is about 464.9967286932.

Adding to 100542503 its reverse (305245001), we get a palindrome (405787504).

The spelling of 100542503 in words is "one hundred million, five hundred forty-two thousand, five hundred three".