12821490 has 80 divisors (see below), whose sum is σ = 37635840. Its totient is φ = 3106080.

The previous prime is 12821477. The next prime is 12821491. The reversal of 12821490 is 9412821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12821491) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 8191 + ... + 9629.

It is an arithmetic number, because the mean of its divisors is an integer number (470448).

Almost surely, 2^12821490 is an apocalyptic number.

12821490 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 12821490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18817920).

12821490 is an abundant number, since it is smaller than the sum of its proper divisors (24814350).

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

12821490 is a wasteful number, since it uses less digits than its factorization.

12821490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1460 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 12821490 is about 3580.7108232863. The cubic root of 12821490 is about 234.0522565738.

It can be divided in two parts, 1282 and 1490, that added together give a palindrome (2772).

The spelling of 12821490 in words is "twelve million, eight hundred twenty-one thousand, four hundred ninety".