100405325 has 6 divisors (see below), whose sum is σ = 124502634. Its totient is φ = 80324240.

The previous prime is 100405303. The next prime is 100405369. The reversal of 100405325 is 523504001.

It can be written as a sum of positive squares in 3 ways, for example, as 24964 + 100380361 = 158^2 + 10019^2 .

It is not a de Polignac number, because 100405325 - 2⁸ = 100405069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100405297 and 100405306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2008082 + ... + 2008131.

It is an arithmetic number, because the mean of its divisors is an integer number (20750439).

Almost surely, 2^100405325 is an apocalyptic number.

It is an amenable number.

100405325 is a deficient number, since it is larger than the sum of its proper divisors (24097309).

100405325 is an equidigital number, since it uses as much as digits as its factorization.

100405325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016223 (or 4016218 counting only the distinct ones).

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

The square root of 100405325 is about 10020.2457554693. The cubic root of 100405325 is about 464.7851553076.

Adding to 100405325 its reverse (523504001), we get a palindrome (623909326).

The spelling of 100405325 in words is "one hundred million, four hundred five thousand, three hundred twenty-five".