105250123 has 4 divisors (see below), whose sum is σ = 114818328. Its totient is φ = 95681920.

The previous prime is 105250109. The next prime is 105250129. The reversal of 105250123 is 321052501.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105250123 is a prime.

It is a super-2 number, since 2×105250123² = 22155176783030258, 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 105250123.

It is not an unprimeable number, because it can be changed into a prime (105250129) 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, 4784086 + ... + 4784107.

It is an arithmetic number, because the mean of its divisors is an integer number (28704582).

Almost surely, 2^105250123 is an apocalyptic number.

105250123 is a deficient number, since it is larger than the sum of its proper divisors (9568205).

105250123 is an equidigital number, since it uses as much as digits as its factorization.

105250123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9568204.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 105250123 is about 10259.1482589930. The cubic root of 105250123 is about 472.1437053452.

The spelling of 105250123 in words is "one hundred five million, two hundred fifty thousand, one hundred twenty-three".