123401 has 2 divisors, whose sum is σ = 123402. Its totient is φ = 123400.

The previous prime is 123397. The next prime is 123407. The reversal of 123401 is 104321.

It is a happy number.

123401 is nontrivially palindromic in base 12.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121801 + 1600 = 349^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 123401 - 2² = 123397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61700 + 61701.

It is an arithmetic number, because the mean of its divisors is an integer number (61701).

2¹²³⁴⁰¹ is an apocalyptic number.

It is an amenable number.

123401 is a deficient number, since it is larger than the sum of its proper divisors (1).

123401 is an equidigital number, since it uses as much as digits as its factorization.

123401 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 123401 is about 351.2847847545. The cubic root of 123401 is about 49.7858843990.

Adding to 123401 its reverse (104321), we get a palindrome (227722).

The spelling of 123401 in words is "one hundred twenty-three thousand, four hundred one", and thus it is an iban number.