123000421 has 2 divisors, whose sum is σ = 123000422. Its totient is φ = 123000420.

The previous prime is 123000419. The next prime is 123000473. The reversal of 123000421 is 124000321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122988100 + 12321 = 11090^2 + 111^2 .

It is an emirp because it is prime and its reverse (124000321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123000421 - 2¹ = 123000419 is a prime.

Together with 123000419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123000721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61500210 + 61500211.

It is an arithmetic number, because the mean of its divisors is an integer number (61500211).

Almost surely, 2^123000421 is an apocalyptic number.

It is an amenable number.

123000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

123000421 is an equidigital number, since it uses as much as digits as its factorization.

123000421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 123000421 is about 11090.5554865390. Note that the first 3 decimals coincide. The cubic root of 123000421 is about 497.3195507281.

Adding to 123000421 its reverse (124000321), we get a palindrome (247000742).

The spelling of 123000421 in words is "one hundred twenty-three million, four hundred twenty-one", and thus it is an aban number.