12610821 has 32 divisors (see below), whose sum is σ = 18845568. Its totient is φ = 7464960.

The previous prime is 12610817. The next prime is 12610841. The reversal of 12610821 is 12801621.

12610821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12610821 - 2² = 12610817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12610811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77286 + ... + 77448.

It is an arithmetic number, because the mean of its divisors is an integer number (588924).

Almost surely, 2^12610821 is an apocalyptic number.

It is an amenable number.

12610821 is a deficient number, since it is larger than the sum of its proper divisors (6234747).

12610821 is a wasteful number, since it uses less digits than its factorization.

12610821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 12610821 is about 3551.1717784416. The cubic root of 12610821 is about 232.7632721254.

It can be divided in two parts, 12610 and 821, that added together give a palindrome (13431).

The spelling of 12610821 in words is "twelve million, six hundred ten thousand, eight hundred twenty-one".