12003810 has 64 divisors (see below), whose sum is σ = 35465472. Its totient is φ = 2532096.

The previous prime is 12003743. The next prime is 12003821. The reversal of 12003810 is 1830021.

It is a happy number.

It is a super-2 number, since 2×12003810² = 288182909032200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12003810.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 532 + ... + 4928.

It is an arithmetic number, because the mean of its divisors is an integer number (554148).

Almost surely, 2^12003810 is an apocalyptic number.

12003810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12003810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17732736).

12003810 is an abundant number, since it is smaller than the sum of its proper divisors (23461662).

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

12003810 is a wasteful number, since it uses less digits than its factorization.

12003810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 12003810 is about 3464.6514976257. The cubic root of 12003810 is about 228.9670757316.

Adding to 12003810 its reverse (1830021), we get a palindrome (13833831).

The spelling of 12003810 in words is "twelve million, three thousand, eight hundred ten".