105040123 has 4 divisors (see below), whose sum is σ = 105842088. Its totient is φ = 104238160.

The previous prime is 105040097. The next prime is 105040129. The reversal of 105040123 is 321040501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105040123 - 2²⁵ = 71485691 is a prime.

It is a super-2 number, since 2×105040123² = 22066854879710258, 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 = 105040097 and 105040106.

It is not an unprimeable number, because it can be changed into a prime (105040129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400786 + ... + 401047.

It is an arithmetic number, because the mean of its divisors is an integer number (26460522).

Almost surely, 2^105040123 is an apocalyptic number.

105040123 is a deficient number, since it is larger than the sum of its proper divisors (801965).

105040123 is an equidigital number, since it uses as much as digits as its factorization.

105040123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801964.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 105040123 is about 10248.9083808960. The cubic root of 105040123 is about 471.8294818190.

Adding to 105040123 its reverse (321040501), we get a palindrome (426080624).

The spelling of 105040123 in words is "one hundred five million, forty thousand, one hundred twenty-three".