401204123 has 2 divisors, whose sum is σ = 401204124. Its totient is φ = 401204122.

The previous prime is 401204119. The next prime is 401204129. The reversal of 401204123 is 321402104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401204123 - 2² = 401204119 is a prime.

It is not a weakly prime, because it can be changed into another prime (401204129) 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, 200602061 + 200602062.

It is an arithmetic number, because the mean of its divisors is an integer number (200602062).

Almost surely, 2^401204123 is an apocalyptic number.

401204123 is a deficient number, since it is larger than the sum of its proper divisors (1).

401204123 is an equidigital number, since it uses as much as digits as its factorization.

401204123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 401204123 is about 20030.0804541569. The cubic root of 401204123 is about 737.5448969316.

Adding to 401204123 its reverse (321402104), we get a palindrome (722606227).

The spelling of 401204123 in words is "four hundred one million, two hundred four thousand, one hundred twenty-three".