12270656 has 28 divisors (see below), whose sum is σ = 25633680. Its totient is φ = 5811840.

The previous prime is 12270647. The next prime is 12270667. The reversal of 12270656 is 65607221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 6261.

Almost surely, 2^12270656 is an apocalyptic number.

12270656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12270656 is an abundant number, since it is smaller than the sum of its proper divisors (13363024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12270656 is a wasteful number, since it uses less digits than its factorization.

12270656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10122 (or 10112 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 12270656 is about 3502.9496142537. The cubic root of 12270656 is about 230.6513107861.

Adding to 12270656 its reverse (65607221), we get a palindrome (77877877).

The spelling of 12270656 in words is "twelve million, two hundred seventy thousand, six hundred fifty-six".