105412123 has 4 divisors (see below), whose sum is σ = 105784888. Its totient is φ = 105039360.

The previous prime is 105412103. The next prime is 105412127. The reversal of 105412123 is 321214501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321214501 = 37 ⋅8681473.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105412123 is a prime.

It is a super-2 number, since 2×105412123² = 22223431350734258, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105412123.

It is not an unprimeable number, because it can be changed into a prime (105412127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185958 + ... + 186523.

It is an arithmetic number, because the mean of its divisors is an integer number (26446222).

Almost surely, 2^105412123 is an apocalyptic number.

105412123 is a deficient number, since it is larger than the sum of its proper divisors (372765).

105412123 is an equidigital number, since it uses as much as digits as its factorization.

105412123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372764.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 105412123 is about 10267.0406154841. The cubic root of 105412123 is about 472.3858208848.

Adding to 105412123 its reverse (321214501), we get a palindrome (426626624).

The spelling of 105412123 in words is "one hundred five million, four hundred twelve thousand, one hundred twenty-three".