105025645 has 4 divisors (see below), whose sum is σ = 126030780. Its totient is φ = 84020512.

The previous prime is 105025601. The next prime is 105025667. The reversal of 105025645 is 546520501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546520501 = 3331 ⋅164071.

It can be written as a sum of positive squares in 2 ways, for example, as 68989636 + 36036009 = 8306^2 + 6003^2 .

It is a cyclic number.

It is not a de Polignac number, because 105025645 - 2⁷ = 105025517 is a prime.

It is a super-3 number, since 3×105025645³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10502560 + ... + 10502569.

It is an arithmetic number, because the mean of its divisors is an integer number (31507695).

Almost surely, 2^105025645 is an apocalyptic number.

It is an amenable number.

105025645 is a deficient number, since it is larger than the sum of its proper divisors (21005135).

105025645 is an equidigital number, since it uses as much as digits as its factorization.

105025645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21005134.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 105025645 is about 10248.2020374308. The cubic root of 105025645 is about 471.8078029249.

The spelling of 105025645 in words is "one hundred five million, twenty-five thousand, six hundred forty-five".