105643445 has 8 divisors (see below), whose sum is σ = 128197080. Its totient is φ = 83564800.

The previous prime is 105643427. The next prime is 105643463. The reversal of 105643445 is 544346501.

It is an interprime number because it is at equal distance from previous prime (105643427) and next prime (105643463).

It can be written as a sum of positive squares in 4 ways, for example, as 5202961 + 100440484 = 2281^2 + 10022^2 .

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

It is not a de Polignac number, because 105643445 - 2¹⁰ = 105642421 is a prime.

It is a super-2 number, since 2×105643445² = 22321074942936050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118256 + ... + 119145.

It is an arithmetic number, because the mean of its divisors is an integer number (16024635).

Almost surely, 2^105643445 is an apocalyptic number.

It is an amenable number.

105643445 is a deficient number, since it is larger than the sum of its proper divisors (22553635).

105643445 is an equidigital number, since it uses as much as digits as its factorization.

105643445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237495.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 105643445 is about 10278.2997134740. The cubic root of 105643445 is about 472.7311113358.

Adding to 105643445 its reverse (544346501), we get a palindrome (649989946).

The spelling of 105643445 in words is "one hundred five million, six hundred forty-three thousand, four hundred forty-five".