12432639 has 8 divisors (see below), whose sum is σ = 16650160. Its totient is φ = 8251776.

The previous prime is 12432601. The next prime is 12432683. The reversal of 12432639 is 93623421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12432639 - 2¹¹ = 12430591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12432689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8362 + ... + 9735.

It is an arithmetic number, because the mean of its divisors is an integer number (2081270).

Almost surely, 2^12432639 is an apocalyptic number.

12432639 is a deficient number, since it is larger than the sum of its proper divisors (4217521).

12432639 is a wasteful number, since it uses less digits than its factorization.

12432639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18329.

The product of its digits is 7776, while the sum is 30.

The square root of 12432639 is about 3525.9947532576. The cubic root of 12432639 is about 231.6618078330.

The spelling of 12432639 in words is "twelve million, four hundred thirty-two thousand, six hundred thirty-nine".