100421232 has 80 divisors (see below), whose sum is σ = 275280000. Its totient is φ = 31456512.

The previous prime is 100421231. The next prime is 100421239. The reversal of 100421232 is 232124001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135519 + ... + 136257.

It is an arithmetic number, because the mean of its divisors is an integer number (3441000).

Almost surely, 2^100421232 is an apocalyptic number.

100421232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100421232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137640000).

100421232 is an abundant number, since it is smaller than the sum of its proper divisors (174858768).

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

100421232 is a wasteful number, since it uses less digits than its factorization.

100421232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 100421232 is about 10021.0394670413. The cubic root of 100421232 is about 464.8096989828.

Adding to 100421232 its reverse (232124001), we get a palindrome (332545233).

The spelling of 100421232 in words is "one hundred million, four hundred twenty-one thousand, two hundred thirty-two".