12432551 has 4 divisors (see below), whose sum is σ = 12462504. Its totient is φ = 12402600.

The previous prime is 12432533. The next prime is 12432569. The reversal of 12432551 is 15523421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15523421 = 79 ⋅196499.

It is an interprime number because it is at equal distance from previous prime (12432533) and next prime (12432569).

It is a cyclic number.

It is not a de Polignac number, because 12432551 - 2¹⁴ = 12416167 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12432521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14345 + ... + 15186.

It is an arithmetic number, because the mean of its divisors is an integer number (3115626).

Almost surely, 2^12432551 is an apocalyptic number.

12432551 is a deficient number, since it is larger than the sum of its proper divisors (29953).

12432551 is an equidigital number, since it uses as much as digits as its factorization.

12432551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29952.

The product of its digits is 1200, while the sum is 23.

The square root of 12432551 is about 3525.9822744875. The cubic root of 12432551 is about 231.6612612533.

Adding to 12432551 its reverse (15523421), we get a palindrome (27955972).

The spelling of 12432551 in words is "twelve million, four hundred thirty-two thousand, five hundred fifty-one".