100421325 has 36 divisors (see below), whose sum is σ = 181291968. Its totient is φ = 53133600.

The previous prime is 100421323. The next prime is 100421333. The reversal of 100421325 is 523124001.

It is not a de Polignac number, because 100421325 - 2¹ = 100421323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100421298 and 100421307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421323) 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 35 ways as a sum of consecutive naturals, for example, 27772 + ... + 31178.

It is an arithmetic number, because the mean of its divisors is an integer number (5035888).

Almost surely, 2^100421325 is an apocalyptic number.

100421325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100421325 is a deficient number, since it is larger than the sum of its proper divisors (80870643).

100421325 is a wasteful number, since it uses less digits than its factorization.

100421325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554 (or 3546 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 100421325 is about 10021.0441072774. The cubic root of 100421325 is about 464.8098424694.

Adding to 100421325 its reverse (523124001), we get a palindrome (623545326).

The spelling of 100421325 in words is "one hundred million, four hundred twenty-one thousand, three hundred twenty-five".