123445105 has 16 divisors (see below), whose sum is σ = 169478784. Its totient is φ = 84556800.

The previous prime is 123445087. The next prime is 123445121. The reversal of 123445105 is 501544321.

It is a happy number.

It is not a de Polignac number, because 123445105 - 2⁷ = 123444977 is a prime.

It is a super-2 number, since 2×123445105² = 30477387896922050, which contains 22 as substring.

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 123445105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54934 + ... + 57136.

It is an arithmetic number, because the mean of its divisors is an integer number (10592424).

Almost surely, 2^123445105 is an apocalyptic number.

It is an amenable number.

123445105 is a deficient number, since it is larger than the sum of its proper divisors (46033679).

123445105 is a wasteful number, since it uses less digits than its factorization.

123445105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 123445105 is about 11110.5852681126. The cubic root of 123445105 is about 497.9181505026.

Adding to 123445105 its reverse (501544321), we get a palindrome (624989426).

The spelling of 123445105 in words is "one hundred twenty-three million, four hundred forty-five thousand, one hundred five".