12821650 has 24 divisors (see below), whose sum is σ = 23949360. Its totient is φ = 5106960.

The previous prime is 12821629. The next prime is 12821659. The reversal of 12821650 is 5612821.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (12821659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16981 + ... + 17719.

It is an arithmetic number, because the mean of its divisors is an integer number (997890).

Almost surely, 2^12821650 is an apocalyptic number.

12821650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12821650 is a deficient number, since it is larger than the sum of its proper divisors (11127710).

12821650 is a wasteful number, since it uses less digits than its factorization.

12821650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1093 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 12821650 is about 3580.7331651493. The cubic root of 12821650 is about 234.0532301530.

The spelling of 12821650 in words is "twelve million, eight hundred twenty-one thousand, six hundred fifty".