12220705 has 64 divisors (see below), whose sum is σ = 19906560. Its totient is φ = 6994944.

The previous prime is 12220699. The next prime is 12220717. The reversal of 12220705 is 50702221.

12220705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12220705 - 2⁵ = 12220673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 259992 + ... + 260038.

It is an arithmetic number, because the mean of its divisors is an integer number (311040).

Almost surely, 2^12220705 is an apocalyptic number.

It is an amenable number.

12220705 is a deficient number, since it is larger than the sum of its proper divisors (7685855).

12220705 is a wasteful number, since it uses less digits than its factorization.

12220705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 12220705 is about 3495.8124949717. The cubic root of 12220705 is about 230.3379091080.

Adding to 12220705 its reverse (50702221), we get a palindrome (62922926).

The spelling of 12220705 in words is "twelve million, two hundred twenty thousand, seven hundred five".