12205457 has 8 divisors (see below), whose sum is σ = 13514592. Its totient is φ = 10929600.

The previous prime is 12205447. The next prime is 12205463. The reversal of 12205457 is 75450221.

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

It is not a de Polignac number, because 12205457 - 2⁴ = 12205441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12205447) 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, 7544 + ... + 9017.

It is an arithmetic number, because the mean of its divisors is an integer number (1689324).

Almost surely, 2^12205457 is an apocalyptic number.

It is an amenable number.

12205457 is a deficient number, since it is larger than the sum of its proper divisors (1309135).

12205457 is a wasteful number, since it uses less digits than its factorization.

12205457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16639.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 12205457 is about 3493.6309192586. The cubic root of 12205457 is about 230.2420702784.

Adding to 12205457 its reverse (75450221), we get a palindrome (87655678).

The spelling of 12205457 in words is "twelve million, two hundred five thousand, four hundred fifty-seven".