12145812 has 24 divisors (see below), whose sum is σ = 32389056. Its totient is φ = 3470208.

The previous prime is 12145801. The next prime is 12145829. The reversal of 12145812 is 21854121.

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

It is a congruent number.

It is an unprimeable number.

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, 72213 + ... + 72380.

It is an arithmetic number, because the mean of its divisors is an integer number (1349544).

Almost surely, 2^12145812 is an apocalyptic number.

12145812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12145812 is an abundant number, since it is smaller than the sum of its proper divisors (20243244).

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

12145812 is a wasteful number, since it uses less digits than its factorization.

12145812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144607 (or 144605 counting only the distinct ones).

The product of its digits is 640, while the sum is 24.

The square root of 12145812 is about 3485.0842170599. The cubic root of 12145812 is about 229.8664126587.

Adding to 12145812 its reverse (21854121), we get a palindrome (33999933).

The spelling of 12145812 in words is "twelve million, one hundred forty-five thousand, eight hundred twelve".