12270005 has 24 divisors (see below), whose sum is σ = 17150616. Its totient is φ = 8391680.

The previous prime is 12269989. The next prime is 12270047. The reversal of 12270005 is 50007221.

It can be written as a sum of positive squares in 4 ways, for example, as 2579236 + 9690769 = 1606^2 + 3113^2 .

It is not a de Polignac number, because 12270005 - 2⁴ = 12269989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9689 + ... + 10881.

It is an arithmetic number, because the mean of its divisors is an integer number (714609).

Almost surely, 2^12270005 is an apocalyptic number.

It is an amenable number.

12270005 is a deficient number, since it is larger than the sum of its proper divisors (4880611).

12270005 is a wasteful number, since it uses less digits than its factorization.

12270005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237 (or 1226 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 12270005 is about 3502.8566913307. The cubic root of 12270005 is about 230.6472317687.

Adding to 12270005 its reverse (50007221), we get a palindrome (62277226).

The spelling of 12270005 in words is "twelve million, two hundred seventy thousand, five".