123045217 has 2 divisors, whose sum is σ = 123045218. Its totient is φ = 123045216.

The previous prime is 123045211. The next prime is 123045227. The reversal of 123045217 is 712540321.

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., 121088016 + 1957201 = 11004^2 + 1399^2 .

It is a cyclic number.

It is not a de Polignac number, because 123045217 - 2¹⁹ = 122520929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123045191 and 123045200.

It is not a weakly prime, because it can be changed into another prime (123045211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61522608 + 61522609.

It is an arithmetic number, because the mean of its divisors is an integer number (61522609).

Almost surely, 2^123045217 is an apocalyptic number.

It is an amenable number.

123045217 is a deficient number, since it is larger than the sum of its proper divisors (1).

123045217 is an equidigital number, since it uses as much as digits as its factorization.

123045217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 123045217 is about 11092.5748588865. The cubic root of 123045217 is about 497.3799169785.

Adding to 123045217 its reverse (712540321), we get a palindrome (835585538).

The spelling of 123045217 in words is "one hundred twenty-three million, forty-five thousand, two hundred seventeen".