123455401 has 2 divisors, whose sum is σ = 123455402. Its totient is φ = 123455400.

The previous prime is 123455393. The next prime is 123455413. The reversal of 123455401 is 104554321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102515625 + 20939776 = 10125^2 + 4576^2 .

It is a cyclic number.

It is not a de Polignac number, because 123455401 - 2³ = 123455393 is a prime.

It is not a weakly prime, because it can be changed into another prime (123455441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61727700 + 61727701.

It is an arithmetic number, because the mean of its divisors is an integer number (61727701).

Almost surely, 2^123455401 is an apocalyptic number.

It is an amenable number.

123455401 is a deficient number, since it is larger than the sum of its proper divisors (1).

123455401 is an equidigital number, since it uses as much as digits as its factorization.

123455401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 123455401 is about 11111.0486003797. The cubic root of 123455401 is about 497.9319931542.

The spelling of 123455401 in words is "one hundred twenty-three million, four hundred fifty-five thousand, four hundred one".