100503120 has 40 divisors (see below), whose sum is σ = 311560416. Its totient is φ = 26800768.

The previous prime is 100503119. The next prime is 100503131. The reversal of 100503120 is 21305001.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100503096 and 100503105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209142 + ... + 209621.

Almost surely, 2^100503120 is an apocalyptic number.

100503120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100503120 is an abundant number, since it is smaller than the sum of its proper divisors (211057296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100503120 is a wasteful number, since it uses less digits than its factorization.

100503120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418779 (or 418773 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 100503120 is about 10025.1244381304. The cubic root of 100503120 is about 464.9360069181.

Adding to 100503120 its reverse (21305001), we get a palindrome (121808121).

The spelling of 100503120 in words is "one hundred million, five hundred three thousand, one hundred twenty".