12581606 has 4 divisors (see below), whose sum is σ = 18872412. Its totient is φ = 6290802.

The previous prime is 12581603. The next prime is 12581627. The reversal of 12581606 is 60618521.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3145400 + ... + 3145403.

It is an arithmetic number, because the mean of its divisors is an integer number (4718103).

Almost surely, 2^12581606 is an apocalyptic number.

12581606 is a deficient number, since it is larger than the sum of its proper divisors (6290806).

12581606 is an equidigital number, since it uses as much as digits as its factorization.

12581606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6290805.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 12581606 is about 3547.0559623440. The cubic root of 12581606 is about 232.5833885952.

The spelling of 12581606 in words is "twelve million, five hundred eighty-one thousand, six hundred six".