100003240 has 16 divisors (see below), whose sum is σ = 225007380. Its totient is φ = 40001280.

The previous prime is 100003219. The next prime is 100003243. The reversal of 100003240 is 42300001.

It can be written as a sum of positive squares in 2 ways, for example, as 85119076 + 14884164 = 9226^2 + 3858^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (100003243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250001 + ... + 1250080.

Almost surely, 2^100003240 is an apocalyptic number.

100003240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100003240 is an abundant number, since it is smaller than the sum of its proper divisors (125004140).

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

100003240 is a wasteful number, since it uses less digits than its factorization.

100003240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500092 (or 2500088 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 100003240 is about 10000.1619986878. The cubic root of 100003240 is about 464.1638962231.

Adding to 100003240 its reverse (42300001), we get a palindrome (142303241).

The spelling of 100003240 in words is "one hundred million, three thousand, two hundred forty".