8129105 has 4 divisors (see below), whose sum is σ = 9754932. Its totient is φ = 6503280.

The previous prime is 8129081. The next prime is 8129113. The reversal of 8129105 is 5019218.

It is a happy number.

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 6431296 + 1697809 = 2536^2 + 1303^2 .

It is not a de Polignac number, because 8129105 - 2¹² = 8125009 is a prime.

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, 812906 + ... + 812915.

It is an arithmetic number, because the mean of its divisors is an integer number (2438733).

Almost surely, 2^8129105 is an apocalyptic number.

It is an amenable number.

8129105 is a deficient number, since it is larger than the sum of its proper divisors (1625827).

8129105 is a wasteful number, since it uses less digits than its factorization.

8129105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625826.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 8129105 is about 2851.1585364550. The cubic root of 8129105 is about 201.0701388021.

The spelling of 8129105 in words is "eight million, one hundred twenty-nine thousand, one hundred five".