12423537 has 20 divisors (see below), whose sum is σ = 21210816. Its totient is φ = 7098840.

The previous prime is 12423491. The next prime is 12423539. The reversal of 12423537 is 73532421.

12423537 is a `hidden beast` number, since 124 + 2 + 3 + 537 = 666.

It is not a de Polignac number, because 12423537 - 2⁷ = 12423409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12423537.

It is not an unprimeable number, because it can be changed into a prime (12423539) 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 in 19 ways as a sum of consecutive naturals, for example, 10389 + ... + 11522.

Almost surely, 2^12423537 is an apocalyptic number.

It is an amenable number.

12423537 is a deficient number, since it is larger than the sum of its proper divisors (8787279).

12423537 is an equidigital number, since it uses as much as digits as its factorization.

12423537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21930 (or 21921 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 12423537 is about 3524.7038173441. The cubic root of 12423537 is about 231.6052604244.

Adding to 12423537 its reverse (73532421), we get a palindrome (85955958).

The spelling of 12423537 in words is "twelve million, four hundred twenty-three thousand, five hundred thirty-seven".