105820025 has 12 divisors (see below), whose sum is σ = 138123600. Its totient is φ = 80200080.

The previous prime is 105820003. The next prime is 105820031. The reversal of 105820025 is 520028501.

It is not a de Polignac number, because 105820025 - 2¹² = 105815929 is a prime.

It is a super-2 number, since 2×105820025² = 22395755382001250, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 110915 + ... + 111864.

It is an arithmetic number, because the mean of its divisors is an integer number (11510300).

Almost surely, 2^105820025 is an apocalyptic number.

It is an amenable number.

105820025 is a deficient number, since it is larger than the sum of its proper divisors (32303575).

105820025 is a wasteful number, since it uses less digits than its factorization.

105820025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222808 (or 222803 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 105820025 is about 10286.8860691659. The cubic root of 105820025 is about 472.9943502403.

Adding to 105820025 its reverse (520028501), we get a palindrome (625848526).

The spelling of 105820025 in words is "one hundred five million, eight hundred twenty thousand, twenty-five".