123030105 has 64 divisors (see below), whose sum is σ = 237385728. Its totient is φ = 53672960.

The previous prime is 123030079. The next prime is 123030133. The reversal of 123030105 is 501030321.

It is a happy number.

It is not a de Polignac number, because 123030105 - 2²⁴ = 106252889 is a prime.

It is a super-2 number, since 2×123030105² = 30272813472622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 63562 + ... + 65468.

It is an arithmetic number, because the mean of its divisors is an integer number (3709152).

Almost surely, 2^123030105 is an apocalyptic number.

123030105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123030105 is a deficient number, since it is larger than the sum of its proper divisors (114355623).

123030105 is a wasteful number, since it uses less digits than its factorization.

123030105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 123030105 is about 11091.8936615891. The cubic root of 123030105 is about 497.3595539683.

Adding to 123030105 its reverse (501030321), we get a palindrome (624060426).

The spelling of 123030105 in words is "one hundred twenty-three million, thirty thousand, one hundred five".