105256138 has 16 divisors (see below), whose sum is σ = 175893480. Its totient is φ = 46904256.

The previous prime is 105256127. The next prime is 105256159. The reversal of 105256138 is 831652501.

It can be written as a sum of positive squares in 4 ways, for example, as 74597769 + 30658369 = 8637^2 + 5537^2 .

It is a super-2 number, since 2×105256138² = 22157709173350088, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 69045 + ... + 70552.

Almost surely, 2^105256138 is an apocalyptic number.

105256138 is a deficient number, since it is larger than the sum of its proper divisors (70637342).

105256138 is a wasteful number, since it uses less digits than its factorization.

105256138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139641.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 105256138 is about 10259.4414077960. The cubic root of 105256138 is about 472.1526994449.

The spelling of 105256138 in words is "one hundred five million, two hundred fifty-six thousand, one hundred thirty-eight".