105742865 has 4 divisors (see below), whose sum is σ = 126891444. Its totient is φ = 84594288.

The previous prime is 105742841. The next prime is 105742939. The reversal of 105742865 is 568247501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41886784 + 63856081 = 6472^2 + 7991^2 .

It is a cyclic number.

It is not a de Polignac number, because 105742865 - 2¹² = 105738769 is a prime.

It is a super-2 number, since 2×105742865² = 22363106996816450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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, 10574282 + ... + 10574291.

It is an arithmetic number, because the mean of its divisors is an integer number (31722861).

Almost surely, 2^105742865 is an apocalyptic number.

It is an amenable number.

105742865 is a deficient number, since it is larger than the sum of its proper divisors (21148579).

105742865 is an equidigital number, since it uses as much as digits as its factorization.

105742865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21148578.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 105742865 is about 10283.1349791783. The cubic root of 105742865 is about 472.8793590300.

The spelling of 105742865 in words is "one hundred five million, seven hundred forty-two thousand, eight hundred sixty-five".