12217402 has 8 divisors (see below), whose sum is σ = 18396576. Its totient is φ = 6085212.

The previous prime is 12217397. The next prime is 12217409. The reversal of 12217402 is 20471221.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12217402.

It is not an unprimeable number, because it can be changed into a prime (12217409) 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 3 ways as a sum of consecutive naturals, for example, 11088 + ... + 12139.

It is an arithmetic number, because the mean of its divisors is an integer number (2299572).

Almost surely, 2^12217402 is an apocalyptic number.

12217402 is a deficient number, since it is larger than the sum of its proper divisors (6179174).

12217402 is a wasteful number, since it uses less digits than its factorization.

12217402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23492.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12217402 is about 3495.3400406827. The cubic root of 12217402 is about 230.3171554045.

Adding to 12217402 its reverse (20471221), we get a palindrome (32688623).

The spelling of 12217402 in words is "twelve million, two hundred seventeen thousand, four hundred two".