105123243 has 8 divisors (see below), whose sum is σ = 140284368. Its totient is φ = 70022144.

The previous prime is 105123233. The next prime is 105123269. The reversal of 105123243 is 342321501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105123243 - 2⁸ = 105122987 is a prime.

It is a super-2 number, since 2×105123243² = 22101792437674098, which contains 22 as substring.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (105123233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10746 + ... + 18047.

It is an arithmetic number, because the mean of its divisors is an integer number (17535546).

Almost surely, 2^105123243 is an apocalyptic number.

105123243 is a deficient number, since it is larger than the sum of its proper divisors (35161125).

105123243 is a wasteful number, since it uses less digits than its factorization.

105123243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30013.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 105123243 is about 10252.9626450114. The cubic root of 105123243 is about 471.9539045165.

Adding to 105123243 its reverse (342321501), we get a palindrome (447444744).

The spelling of 105123243 in words is "one hundred five million, one hundred twenty-three thousand, two hundred forty-three".