12132656 has 40 divisors (see below), whose sum is σ = 24724608. Its totient is φ = 5760000.

The previous prime is 12132641. The next prime is 12132667. The reversal of 12132656 is 65623121.

It is a super-2 number, since 2×12132656² = 294402683228672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30056 + ... + 30456.

Almost surely, 2^12132656 is an apocalyptic number.

12132656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12132656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12362304).

12132656 is an abundant number, since it is smaller than the sum of its proper divisors (12591952).

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

12132656 is a wasteful number, since it uses less digits than its factorization.

12132656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 495 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 12132656 is about 3483.1962333466. The cubic root of 12132656 is about 229.7833877427.

Adding to 12132656 its reverse (65623121), we get a palindrome (77755777).

The spelling of 12132656 in words is "twelve million, one hundred thirty-two thousand, six hundred fifty-six".