12209657 has 8 divisors (see below), whose sum is σ = 12441600. Its totient is φ = 11979520.

The previous prime is 12209651. The next prime is 12209683. The reversal of 12209657 is 75690221.

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 12209657 - 2¹² = 12205561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12209651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26969 + ... + 27417.

It is an arithmetic number, because the mean of its divisors is an integer number (1555200).

Almost surely, 2^12209657 is an apocalyptic number.

It is an amenable number.

12209657 is a deficient number, since it is larger than the sum of its proper divisors (231943).

12209657 is an equidigital number, since it uses as much as digits as its factorization.

12209657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 12209657 is about 3494.2319613901. The cubic root of 12209657 is about 230.2684766581.

Adding to 12209657 its reverse (75690221), we get a palindrome (87899878).

The spelling of 12209657 in words is "twelve million, two hundred nine thousand, six hundred fifty-seven".