100421706 has 32 divisors (see below), whose sum is σ = 250403328. Its totient is φ = 26083440.

The previous prime is 100421687. The next prime is 100421723. The reversal of 100421706 is 607124001.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 15 ways as a sum of consecutive naturals, for example, 108220 + ... + 109143.

It is an arithmetic number, because the mean of its divisors is an integer number (7825104).

Almost surely, 2^100421706 is an apocalyptic number.

100421706 is an abundant number, since it is smaller than the sum of its proper divisors (149981622).

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

100421706 is a wasteful number, since it uses less digits than its factorization.

100421706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217386.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 100421706 is about 10021.0631172546. The cubic root of 100421706 is about 464.8104303005.

Adding to 100421706 its reverse (607124001), we get a palindrome (707545707).

The spelling of 100421706 in words is "one hundred million, four hundred twenty-one thousand, seven hundred six".