12662121 has 8 divisors (see below), whose sum is σ = 17616960. Its totient is φ = 8074352.

The previous prime is 12662087. The next prime is 12662123. The reversal of 12662121 is 12126621.

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 12662121 - 2⁶ = 12662057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12662123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91686 + ... + 91823.

It is an arithmetic number, because the mean of its divisors is an integer number (2202120).

Almost surely, 2^12662121 is an apocalyptic number.

It is an amenable number.

12662121 is a deficient number, since it is larger than the sum of its proper divisors (4954839).

12662121 is a wasteful number, since it uses less digits than its factorization.

12662121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183535.

The product of its digits is 288, while the sum is 21.

The square root of 12662121 is about 3558.3874156702. The cubic root of 12662121 is about 233.0784670665.

Adding to 12662121 its reverse (12126621), we get a palindrome (24788742).

The spelling of 12662121 in words is "twelve million, six hundred sixty-two thousand, one hundred twenty-one".