105081781 has 8 divisors (see below), whose sum is σ = 121011264. Its totient is φ = 89381760.

The previous prime is 105081763. The next prime is 105081787. The reversal of 105081781 is 187180501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105081781 - 2⁷ = 105081653 is a prime.

It is a super-2 number, since 2×105081781² = 22084361396263922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105081787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56380 + ... + 58213.

It is an arithmetic number, because the mean of its divisors is an integer number (15126408).

Almost surely, 2^105081781 is an apocalyptic number.

It is an amenable number.

105081781 is a deficient number, since it is larger than the sum of its proper divisors (15929483).

105081781 is a wasteful number, since it uses less digits than its factorization.

105081781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114731.

The product of its (nonzero) digits is 2240, while the sum is 31.

The square root of 105081781 is about 10250.9404934377. The cubic root of 105081781 is about 471.8918480659.

The spelling of 105081781 in words is "one hundred five million, eighty-one thousand, seven hundred eighty-one".