123100145 has 32 divisors (see below), whose sum is σ = 188179200. Its totient is φ = 75257856.

The previous prime is 123100139. The next prime is 123100169. The reversal of 123100145 is 541001321.

It is a cyclic number.

It is not a de Polignac number, because 123100145 - 2⁴ = 123100129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5861 + ... + 16749.

It is an arithmetic number, because the mean of its divisors is an integer number (5880600).

Almost surely, 2^123100145 is an apocalyptic number.

It is an amenable number.

123100145 is a deficient number, since it is larger than the sum of its proper divisors (65079055).

123100145 is a wasteful number, since it uses less digits than its factorization.

123100145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10937.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 123100145 is about 11095.0504730713. The cubic root of 123100145 is about 497.4539169288.

Adding to 123100145 its reverse (541001321), we get a palindrome (664101466).

The spelling of 123100145 in words is "one hundred twenty-three million, one hundred thousand, one hundred forty-five".