105665425 has 6 divisors (see below), whose sum is σ = 131025158. Its totient is φ = 84532320.

The previous prime is 105665419. The next prime is 105665429. The reversal of 105665425 is 524566501.

It can be written as a sum of positive squares in 3 ways, for example, as 3594816 + 102070609 = 1896^2 + 10103^2 .

It is not a de Polignac number, because 105665425 - 2⁷ = 105665297 is a prime.

It is a super-2 number, since 2×105665425² = 22330364080861250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105665429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2113284 + ... + 2113333.

Almost surely, 2^105665425 is an apocalyptic number.

It is an amenable number.

105665425 is a deficient number, since it is larger than the sum of its proper divisors (25359733).

105665425 is an equidigital number, since it uses as much as digits as its factorization.

105665425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226627 (or 4226622 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 105665425 is about 10279.3689008616. The cubic root of 105665425 is about 472.7638942794.

The spelling of 105665425 in words is "one hundred five million, six hundred sixty-five thousand, four hundred twenty-five".