105840605 has 8 divisors (see below), whose sum is σ = 136778712. Its totient is φ = 78159168.

The previous prime is 105840601. The next prime is 105840607. The reversal of 105840605 is 506048501.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17123044 + 88717561 = 4138^2 + 9419^2 .

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 105840605 - 2² = 105840601 is a prime.

It is a super-2 number, since 2×105840605² = 22404467333532050, 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 (105840601) 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, 814094 + ... + 814223.

It is an arithmetic number, because the mean of its divisors is an integer number (17097339).

Almost surely, 2^105840605 is an apocalyptic number.

It is an amenable number.

105840605 is a deficient number, since it is larger than the sum of its proper divisors (30938107).

105840605 is a wasteful number, since it uses less digits than its factorization.

105840605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628335.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 105840605 is about 10287.8863232444. The cubic root of 105840605 is about 473.0250110809.

The spelling of 105840605 in words is "one hundred five million, eight hundred forty thousand, six hundred five".