12541639 has 8 divisors (see below), whose sum is σ = 14123520. Its totient is φ = 11033400.

The previous prime is 12541637. The next prime is 12541651. The reversal of 12541639 is 93614521.

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

It is a cyclic number.

It is not a de Polignac number, because 12541639 - 2¹ = 12541637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12541639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12541637) 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 in 7 ways as a sum of consecutive naturals, for example, 18049 + ... + 18730.

It is an arithmetic number, because the mean of its divisors is an integer number (1765440).

Almost surely, 2^12541639 is an apocalyptic number.

12541639 is a deficient number, since it is larger than the sum of its proper divisors (1581881).

12541639 is a wasteful number, since it uses less digits than its factorization.

12541639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36821.

The product of its digits is 6480, while the sum is 31.

The square root of 12541639 is about 3541.4176539911. The cubic root of 12541639 is about 232.3368508948.

The spelling of 12541639 in words is "twelve million, five hundred forty-one thousand, six hundred thirty-nine".