2105134145 has 4 divisors (see below), whose sum is σ = 2526160980. Its totient is φ = 1684107312.

The previous prime is 2105134103. The next prime is 2105134151. The reversal of 2105134145 is 5414315012.

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 1650634384 + 454499761 = 40628^2 + 21319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105134145 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210513410 + ... + 210513419.

It is an arithmetic number, because the mean of its divisors is an integer number (631540245).

Almost surely, 2^2105134145 is an apocalyptic number.

It is an amenable number.

2105134145 is a deficient number, since it is larger than the sum of its proper divisors (421026835).

2105134145 is an equidigital number, since it uses as much as digits as its factorization.

2105134145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421026834.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2105134145 is about 45881.7408671467. The cubic root of 2105134145 is about 1281.6219155255.

Adding to 2105134145 its reverse (5414315012), we get a palindrome (7519449157).

The spelling of 2105134145 in words is "two billion, one hundred five million, one hundred thirty-four thousand, one hundred forty-five".