123424321 has 2 divisors, whose sum is σ = 123424322. Its totient is φ = 123424320.

The previous prime is 123424271. The next prime is 123424349.

123424321 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 55130625 = 8264^2 + 7425^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 123424321 - 2⁹ = 123423809 is a prime.

It is a super-2 number, since 2×123424321² = 30467126028622082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123424292 and 123424301.

It is not a weakly prime, because it can be changed into another prime (123424621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61712160 + 61712161.

It is an arithmetic number, because the mean of its divisors is an integer number (61712161).

Almost surely, 2^123424321 is an apocalyptic number.

It is an amenable number.

123424321 is a deficient number, since it is larger than the sum of its proper divisors (1).

123424321 is an equidigital number, since it uses as much as digits as its factorization.

123424321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

The square root of 123424321 is about 11109.6499044749. The cubic root of 123424321 is about 497.8902047160.

The spelling of 123424321 in words is "one hundred twenty-three million, four hundred twenty-four thousand, three hundred twenty-one".