12321670 has 16 divisors (see below), whose sum is σ = 22484160. Its totient is φ = 4860864.

The previous prime is 12321653. The next prime is 12321679. The reversal of 12321670 is 7612321.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321679) 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, 7710 + ... + 9169.

It is an arithmetic number, because the mean of its divisors is an integer number (1405260).

Almost surely, 2^12321670 is an apocalyptic number.

12321670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12321670 is a deficient number, since it is larger than the sum of its proper divisors (10162490).

12321670 is a wasteful number, since it uses less digits than its factorization.

12321670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16959.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 12321670 is about 3510.2236395990. The cubic root of 12321670 is about 230.9705052826.

Adding to 12321670 its reverse (7612321), we get a palindrome (19933991).

The spelling of 12321670 in words is "twelve million, three hundred twenty-one thousand, six hundred seventy".