124123421 has 2 divisors, whose sum is σ = 124123422. Its totient is φ = 124123420.

The previous prime is 124123397. The next prime is 124123427. The reversal of 124123421 is 124321421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110544196 + 13579225 = 10514^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 124123421 - 2⁶ = 124123357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124123393 and 124123402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124123427) 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, 62061710 + 62061711.

It is an arithmetic number, because the mean of its divisors is an integer number (62061711).

Almost surely, 2^124123421 is an apocalyptic number.

It is an amenable number.

124123421 is a deficient number, since it is larger than the sum of its proper divisors (1).

124123421 is an equidigital number, since it uses as much as digits as its factorization.

124123421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 124123421 is about 11141.0691138687. The cubic root of 124123421 is about 498.8284852502.

Adding to 124123421 its reverse (124321421), we get a palindrome (248444842).

The spelling of 124123421 in words is "one hundred twenty-four million, one hundred twenty-three thousand, four hundred twenty-one".