105139856 has 20 divisors (see below), whose sum is σ = 206501292. Its totient is φ = 51849216.

The previous prime is 105139847. The next prime is 105139861. The reversal of 105139856 is 658931501.

It can be written as a sum of positive squares in 2 ways, for example, as 78925456 + 26214400 = 8884^2 + 5120^2 .

It is a super-2 number, since 2×105139856² = 22108778639401472, which contains 22 as substring.

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, 43841 + ... + 46176.

Almost surely, 2^105139856 is an apocalyptic number.

105139856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

105139856 is a deficient number, since it is larger than the sum of its proper divisors (101361436).

105139856 is an equidigital number, since it uses as much as digits as its factorization.

105139856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90098 (or 90092 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 105139856 is about 10253.7727690836. The cubic root of 105139856 is about 471.9787647250.

The spelling of 105139856 in words is "one hundred five million, one hundred thirty-nine thousand, eight hundred fifty-six".