107871721 has 16 divisors (see below), whose sum is σ = 117100800. Its totient is φ = 99042048.

The previous prime is 107871719. The next prime is 107871733. The reversal of 107871721 is 127178701.

It is a cyclic number.

It is not a de Polignac number, because 107871721 - 2¹ = 107871719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (107871521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100375 + ... + 101443.

It is an arithmetic number, because the mean of its divisors is an integer number (7318800).

Almost surely, 2^107871721 is an apocalyptic number.

It is an amenable number.

107871721 is a deficient number, since it is larger than the sum of its proper divisors (9229079).

107871721 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (107871720) it forms an eRAP, since the sums of their prime factors are consecutive (1247 and 1248).

107871721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 5488, while the sum is 34.

The square root of 107871721 is about 10386.1311853837. The cubic root of 107871721 is about 476.0316943917.

The spelling of 107871721 in words is "one hundred seven million, eight hundred seventy-one thousand, seven hundred twenty-one".