100421140 has 36 divisors (see below), whose sum is σ = 215561556. Its totient is φ = 39296512.

The previous prime is 100421077. The next prime is 100421143. The reversal of 100421140 is 41124001.

It can be written as a sum of positive squares in 2 ways, for example, as 65351056 + 35070084 = 8084^2 + 5922^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 100421140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43044 + ... + 45316.

It is an arithmetic number, because the mean of its divisors is an integer number (5987821).

Almost surely, 2^100421140 is an apocalyptic number.

100421140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100421140 is an abundant number, since it is smaller than the sum of its proper divisors (115140416).

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

100421140 is a wasteful number, since it uses less digits than its factorization.

100421140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2327 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 100421140 is about 10021.0348766981. The cubic root of 100421140 is about 464.8095570391.

Adding to 100421140 its reverse (41124001), we get a palindrome (141545141).

The spelling of 100421140 in words is "one hundred million, four hundred twenty-one thousand, one hundred forty".