123423105 has 16 divisors (see below), whose sum is σ = 212667840. Its totient is φ = 60762048.

The previous prime is 123423067. The next prime is 123423119. The reversal of 123423105 is 501324321.

It is a de Polignac number, because none of the positive numbers 2^k-123423105 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 316275 + ... + 316664.

It is an arithmetic number, because the mean of its divisors is an integer number (13291740).

Almost surely, 2^123423105 is an apocalyptic number.

123423105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123423105 is a deficient number, since it is larger than the sum of its proper divisors (89244735).

123423105 is a wasteful number, since it uses less digits than its factorization.

123423105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632960.

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

The square root of 123423105 is about 11109.5951771430. The cubic root of 123423105 is about 497.8885696075. Note that the first 3 decimals are identical.

Adding to 123423105 its reverse (501324321), we get a palindrome (624747426).

The spelling of 123423105 in words is "one hundred twenty-three million, four hundred twenty-three thousand, one hundred five".