12231646 has 8 divisors (see below), whose sum is σ = 20968560. Its totient is φ = 5242128.

The previous prime is 12231643. The next prime is 12231647. The reversal of 12231646 is 64613221.

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

It is a super-2 number, since 2×12231646² = 299226327738632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12231646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436831 + ... + 436858.

It is an arithmetic number, because the mean of its divisors is an integer number (2621070).

Almost surely, 2^12231646 is an apocalyptic number.

12231646 is a deficient number, since it is larger than the sum of its proper divisors (8736914).

12231646 is an equidigital number, since it uses as much as digits as its factorization.

12231646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873698.

The product of its digits is 1728, while the sum is 25.

The square root of 12231646 is about 3497.3770171373. The cubic root of 12231646 is about 230.4066278757.

Adding to 12231646 its reverse (64613221), we get a palindrome (76844867).

The spelling of 12231646 in words is "twelve million, two hundred thirty-one thousand, six hundred forty-six".