12642351 has 4 divisors (see below), whose sum is σ = 16856472. Its totient is φ = 8428232.

The previous prime is 12642337. The next prime is 12642367. The reversal of 12642351 is 15324621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12642351 - 2⁵ = 12642319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640351) 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 in 3 ways as a sum of consecutive naturals, for example, 2107056 + ... + 2107061.

It is an arithmetic number, because the mean of its divisors is an integer number (4214118).

Almost surely, 2^12642351 is an apocalyptic number.

12642351 is a deficient number, since it is larger than the sum of its proper divisors (4214121).

12642351 is an equidigital number, since it uses as much as digits as its factorization.

12642351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214120.

The product of its digits is 1440, while the sum is 24.

The square root of 12642351 is about 3555.6083867603. The cubic root of 12642351 is about 232.9570982061.

Adding to 12642351 its reverse (15324621), we get a palindrome (27966972).

The spelling of 12642351 in words is "twelve million, six hundred forty-two thousand, three hundred fifty-one".