12582209 has 4 divisors (see below), whose sum is σ = 12602304. Its totient is φ = 12562116.

The previous prime is 12582191. The next prime is 12582223. The reversal of 12582209 is 90228521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90228521 = 541 ⋅166781.

It is a cyclic number.

It is not a de Polignac number, because 12582209 - 2⁸ = 12581953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12582289) 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, 9077 + ... + 10370.

It is an arithmetic number, because the mean of its divisors is an integer number (3150576).

Almost surely, 2^12582209 is an apocalyptic number.

It is an amenable number.

12582209 is a deficient number, since it is larger than the sum of its proper divisors (20095).

12582209 is an equidigital number, since it uses as much as digits as its factorization.

12582209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20094.

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

The square root of 12582209 is about 3547.1409613941. The cubic root of 12582209 is about 232.5871042189.

The spelling of 12582209 in words is "twelve million, five hundred eighty-two thousand, two hundred nine".