105721895 has 16 divisors (see below), whose sum is σ = 135235008. Its totient is φ = 79065600.

The previous prime is 105721879. The next prime is 105721933. The reversal of 105721895 is 598127501.

It is not a de Polignac number, because 105721895 - 2⁴ = 105721879 is a prime.

It is a super-2 number, since 2×105721895² = 22354238164782050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8717 + ... + 16953.

It is an arithmetic number, because the mean of its divisors is an integer number (8452188).

Almost surely, 2^105721895 is an apocalyptic number.

105721895 is a deficient number, since it is larger than the sum of its proper divisors (29513113).

105721895 is a wasteful number, since it uses less digits than its factorization.

105721895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 105721895 is about 10282.1152979336. The cubic root of 105721895 is about 472.8480978641.

The spelling of 105721895 in words is "one hundred five million, seven hundred twenty-one thousand, eight hundred ninety-five".