12148639 has 2 divisors, whose sum is σ = 12148640. Its totient is φ = 12148638.

The previous prime is 12148637. The next prime is 12148649. The reversal of 12148639 is 93684121.

It is a weak prime.

It is an emirp because it is prime and its reverse (93684121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12148639 - 2¹ = 12148637 is a prime.

Together with 12148637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12148637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074319 + 6074320.

It is an arithmetic number, because the mean of its divisors is an integer number (6074320).

Almost surely, 2^12148639 is an apocalyptic number.

12148639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12148639 is an equidigital number, since it uses as much as digits as its factorization.

12148639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 12148639 is about 3485.4897790698. The cubic root of 12148639 is about 229.8842454705.

The spelling of 12148639 in words is "twelve million, one hundred forty-eight thousand, six hundred thirty-nine".