12811622 has 4 divisors (see below), whose sum is σ = 19217436. Its totient is φ = 6405810.

The previous prime is 12811607. The next prime is 12811661. The reversal of 12811622 is 22611821.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202904 + ... + 3202907.

It is an arithmetic number, because the mean of its divisors is an integer number (4804359).

Almost surely, 2^12811622 is an apocalyptic number.

12811622 is a deficient number, since it is larger than the sum of its proper divisors (6405814).

12811622 is an equidigital number, since it uses as much as digits as its factorization.

12811622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405813.

The product of its digits is 384, while the sum is 23.

The square root of 12811622 is about 3579.3326193580. The cubic root of 12811622 is about 233.9921954199.

The spelling of 12811622 in words is "twelve million, eight hundred eleven thousand, six hundred twenty-two".