105457123 has 4 divisors (see below), whose sum is σ = 105867720. Its totient is φ = 105046528.

The previous prime is 105457111. The next prime is 105457127. The reversal of 105457123 is 321754501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321754501 = 137 ⋅2348573.

It is a cyclic number.

It is not a de Polignac number, because 105457123 - 2⁵ = 105457091 is a prime.

It is a super-2 number, since 2×105457123² = 22242409582874258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105457091 and 105457100.

It is not an unprimeable number, because it can be changed into a prime (105457127) 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, 204913 + ... + 205426.

It is an arithmetic number, because the mean of its divisors is an integer number (26466930).

Almost surely, 2^105457123 is an apocalyptic number.

105457123 is a deficient number, since it is larger than the sum of its proper divisors (410597).

105457123 is an equidigital number, since it uses as much as digits as its factorization.

105457123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410596.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 105457123 is about 10269.2318602708. The cubic root of 105457123 is about 472.4530311738.

The spelling of 105457123 in words is "one hundred five million, four hundred fifty-seven thousand, one hundred twenty-three".