123000001 has 4 divisors (see below), whose sum is σ = 123528132. Its totient is φ = 122471872.

The previous prime is 122999999. The next prime is 123000011. The reversal of 123000001 is 100000321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100000321 = 1013 ⋅98717.

It can be written as a sum of positive squares in 2 ways, for example, as 79637776 + 43362225 = 8924^2 + 6585^2 .

It is a cyclic number.

It is not a de Polignac number, because 123000001 - 2¹ = 122999999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123000011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 263716 + ... + 264181.

It is an arithmetic number, because the mean of its divisors is an integer number (30882033).

Almost surely, 2^123000001 is an apocalyptic number.

It is an amenable number.

123000001 is a deficient number, since it is larger than the sum of its proper divisors (528131).

123000001 is an equidigital number, since it uses as much as digits as its factorization.

123000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528130.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 123000001 is about 11090.5365514929. The cubic root of 123000001 is about 497.3189846746.

Adding to 123000001 its reverse (100000321), we get a palindrome (223000322).

The spelling of 123000001 in words is "one hundred twenty-three million, one", and thus it is an aban number.