12587609 has 4 divisors (see below), whose sum is σ = 12760116. Its totient is φ = 12415104.

The previous prime is 12587579. The next prime is 12587629. The reversal of 12587609 is 90678521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90678521 = 431 ⋅210391.

It can be written as a sum of positive squares in 2 ways, for example, as 7425625 + 5161984 = 2725^2 + 2272^2 .

It is a cyclic number.

It is not a de Polignac number, because 12587609 - 2¹² = 12583513 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12587629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86144 + ... + 86289.

It is an arithmetic number, because the mean of its divisors is an integer number (3190029).

Almost surely, 2^12587609 is an apocalyptic number.

It is an amenable number.

12587609 is a deficient number, since it is larger than the sum of its proper divisors (172507).

12587609 is an equidigital number, since it uses as much as digits as its factorization.

12587609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172506.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 12587609 is about 3547.9020561453. The cubic root of 12587609 is about 232.6203731711.

The spelling of 12587609 in words is "twelve million, five hundred eighty-seven thousand, six hundred nine".