100871406 has 20 divisors (see below), whose sum is σ = 226027032. Its totient is φ = 33623748.

The previous prime is 100871389. The next prime is 100871411. The reversal of 100871406 is 604178001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 100871406.

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 311170 + ... + 311493.

Almost surely, 2^100871406 is an apocalyptic number.

100871406 is an abundant number, since it is smaller than the sum of its proper divisors (125155626).

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

100871406 is an equidigital number, since it uses as much as digits as its factorization.

100871406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622677 (or 622668 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 100871406 is about 10043.4757927721. The cubic root of 100871406 is about 465.5032221270.

The spelling of 100871406 in words is "one hundred million, eight hundred seventy-one thousand, four hundred six".