105556257 has 8 divisors (see below), whose sum is σ = 156379680. Its totient is φ = 70370820.

The previous prime is 105556237. The next prime is 105556261. The reversal of 105556257 is 752655501.

It is a happy number.

It is not a de Polignac number, because 105556257 - 2⁶ = 105556193 is a prime.

It is a super-2 number, since 2×105556257² = 22284246783700098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105556237) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1954719 + ... + 1954772.

It is an arithmetic number, because the mean of its divisors is an integer number (19547460).

Almost surely, 2^105556257 is an apocalyptic number.

It is an amenable number.

105556257 is a deficient number, since it is larger than the sum of its proper divisors (50823423).

105556257 is an equidigital number, since it uses as much as digits as its factorization.

105556257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909500 (or 3909494 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 105556257 is about 10274.0574750193. The cubic root of 105556257 is about 472.6010265207.

The spelling of 105556257 in words is "one hundred five million, five hundred fifty-six thousand, two hundred fifty-seven".