12423457 has 2 divisors, whose sum is σ = 12423458. Its totient is φ = 12423456.

The previous prime is 12423409. The next prime is 12423487. The reversal of 12423457 is 75432421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11350161 + 1073296 = 3369^2 + 1036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12423457 is a prime.

It is not a weakly prime, because it can be changed into another prime (12423407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6211728 + 6211729.

It is an arithmetic number, because the mean of its divisors is an integer number (6211729).

Almost surely, 2^12423457 is an apocalyptic number.

It is an amenable number.

12423457 is a deficient number, since it is larger than the sum of its proper divisors (1).

12423457 is an equidigital number, since it uses as much as digits as its factorization.

12423457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 28.

The square root of 12423457 is about 3524.6924688546. The cubic root of 12423457 is about 231.6047632912.

Adding to 12423457 its reverse (75432421), we get a palindrome (87855878).

It can be divided in two parts, 12423 and 457, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 12423457 in words is "twelve million, four hundred twenty-three thousand, four hundred fifty-seven".