101720872 has 16 divisors (see below), whose sum is σ = 208065600. Its totient is φ = 46236720.

The previous prime is 101720863. The next prime is 101720887. The reversal of 101720872 is 278027101.

It is a self number, because there is not a number n which added to its sum of digits gives 101720872.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577872 + ... + 578047.

It is an arithmetic number, because the mean of its divisors is an integer number (13004100).

Almost surely, 2^101720872 is an apocalyptic number.

It is an amenable number.

101720872 is an abundant number, since it is smaller than the sum of its proper divisors (106344728).

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

101720872 is a wasteful number, since it uses less digits than its factorization.

101720872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155936 (or 1155932 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 101720872 is about 10085.6765762144. The cubic root of 101720872 is about 466.8062815826.

Adding to 101720872 its reverse (278027101), we get a palindrome (379747973).

The spelling of 101720872 in words is "one hundred one million, seven hundred twenty thousand, eight hundred seventy-two".