12212565 has 8 divisors (see below), whose sum is σ = 19540128. Its totient is φ = 6513360.

The previous prime is 12212561. The next prime is 12212569. The reversal of 12212565 is 56521221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12212561) and next prime (12212569).

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

It is not a de Polignac number, because 12212565 - 2² = 12212561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407071 + ... + 407100.

It is an arithmetic number, because the mean of its divisors is an integer number (2442516).

Almost surely, 2^12212565 is an apocalyptic number.

12212565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12212565 is a deficient number, since it is larger than the sum of its proper divisors (7327563).

12212565 is an equidigital number, since it uses as much as digits as its factorization.

12212565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814179.

The product of its digits is 1200, while the sum is 24.

The square root of 12212565 is about 3494.6480509488. The cubic root of 12212565 is about 230.2867563847.

Adding to 12212565 its reverse (56521221), we get a palindrome (68733786).

The spelling of 12212565 in words is "twelve million, two hundred twelve thousand, five hundred sixty-five".