100421380 has 24 divisors (see below), whose sum is σ = 223290648. Its totient is φ = 37805568.

The previous prime is 100421359. The next prime is 100421407. The reversal of 100421380 is 83124001.

It can be written as a sum of positive squares in 4 ways, for example, as 39237696 + 61183684 = 6264^2 + 7822^2 .

It is a super-2 number, since 2×100421380² = 20168907122208800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147339 + ... + 148018.

It is an arithmetic number, because the mean of its divisors is an integer number (9303777).

Almost surely, 2^100421380 is an apocalyptic number.

100421380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100421380 is an abundant number, since it is smaller than the sum of its proper divisors (122869268).

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

100421380 is a wasteful number, since it uses less digits than its factorization.

100421380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295383 (or 295381 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 100421380 is about 10021.0468515021. The cubic root of 100421380 is about 464.8099273270.

Adding to 100421380 its reverse (83124001), we get a palindrome (183545381).

The spelling of 100421380 in words is "one hundred million, four hundred twenty-one thousand, three hundred eighty".