105778 has 4 divisors (see below), whose sum is σ = 158670. Its totient is φ = 52888.

The previous prime is 105769. The next prime is 105817. The reversal of 105778 is 877501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877501 = 43 ⋅20407.

It can be written as a sum of positive squares in only one way, i.e., 82369 + 23409 = 287^2 + 153^2 .

It is a super-2 number, since 2×105778² = 22377970568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26443 + ... + 26446.

2¹⁰⁵⁷⁷⁸ is an apocalyptic number.

105778 is a deficient number, since it is larger than the sum of its proper divisors (52892).

105778 is an equidigital number, since it uses as much as digits as its factorization.

105778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52891.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 105778 is about 325.2352994372. The cubic root of 105778 is about 47.2931727501.

It can be divided in two parts, 10577 and 8, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 105778 in words is "one hundred five thousand, seven hundred seventy-eight".