123604121 has 2 divisors, whose sum is σ = 123604122. Its totient is φ = 123604120.

The previous prime is 123604097. The next prime is 123604123. The reversal of 123604121 is 121406321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108889225 + 14714896 = 10435^2 + 3836^2 .

It is a cyclic number.

It is not a de Polignac number, because 123604121 - 2⁶ = 123604057 is a prime.

Together with 123604123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123604093 and 123604102.

It is not a weakly prime, because it can be changed into another prime (123604123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61802060 + 61802061.

It is an arithmetic number, because the mean of its divisors is an integer number (61802061).

Almost surely, 2^123604121 is an apocalyptic number.

It is an amenable number.

123604121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123604121 is an equidigital number, since it uses as much as digits as its factorization.

123604121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 123604121 is about 11117.7390237404. The cubic root of 123604121 is about 498.1318567748.

The spelling of 123604121 in words is "one hundred twenty-three million, six hundred four thousand, one hundred twenty-one".