401000123 has 2 divisors, whose sum is σ = 401000124. Its totient is φ = 401000122.

The previous prime is 401000113. The next prime is 401000143. The reversal of 401000123 is 321000104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401000123 - 2⁶ = 401000059 is a prime.

It is not a weakly prime, because it can be changed into another prime (401000113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200500061 + 200500062.

It is an arithmetic number, because the mean of its divisors is an integer number (200500062).

Almost surely, 2^401000123 is an apocalyptic number.

401000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

401000123 is an equidigital number, since it uses as much as digits as its factorization.

401000123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 401000123 is about 20024.9874656640. The cubic root of 401000123 is about 737.4198694133.

Adding to 401000123 its reverse (321000104), we get a palindrome (722000227).

The spelling of 401000123 in words is "four hundred one million, one hundred twenty-three", and thus it is an aban number.