12390012 has 18 divisors (see below), whose sum is σ = 31319288. Its totient is φ = 4129992.

The previous prime is 12390011. The next prime is 12390013. The reversal of 12390012 is 21009321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12390011) and next prime (12390013).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12390011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172048 + ... + 172119.

Almost surely, 2^12390012 is an apocalyptic number.

12390012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12390012 is an abundant number, since it is smaller than the sum of its proper divisors (18929276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12390012 is a wasteful number, since it uses less digits than its factorization.

12390012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344177 (or 344172 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 12390012 is about 3519.9448859322. The cubic root of 12390012 is about 231.3967432877.

Adding to 12390012 its reverse (21009321), we get a palindrome (33399333).

The spelling of 12390012 in words is "twelve million, three hundred ninety thousand, twelve".