12962821 has 4 divisors (see below), whose sum is σ = 12976992. Its totient is φ = 12948652.

The previous prime is 12962819. The next prime is 12962837. The reversal of 12962821 is 12826921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12962821 - 2¹ = 12962819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12962801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5611 + ... + 7576.

It is an arithmetic number, because the mean of its divisors is an integer number (3244248).

Almost surely, 2^12962821 is an apocalyptic number.

It is an amenable number.

12962821 is a deficient number, since it is larger than the sum of its proper divisors (14171).

12962821 is an equidigital number, since it uses as much as digits as its factorization.

12962821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14170.

The product of its digits is 3456, while the sum is 31.

The square root of 12962821 is about 3600.3917842368. The cubic root of 12962821 is about 234.9091001992.

The spelling of 12962821 in words is "twelve million, nine hundred sixty-two thousand, eight hundred twenty-one".