12148681 has 4 divisors (see below), whose sum is σ = 12177172. Its totient is φ = 12120192.

The previous prime is 12148663. The next prime is 12148687. The reversal of 12148681 is 18684121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3686400 + 8462281 = 1920^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 12148681 - 2⁵ = 12148649 is a prime.

It is a super-2 number, since 2×12148681² = 295180900079522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12148687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13596 + ... + 14461.

It is an arithmetic number, because the mean of its divisors is an integer number (3044293).

Almost surely, 2^12148681 is an apocalyptic number.

It is an amenable number.

12148681 is a deficient number, since it is larger than the sum of its proper divisors (28491).

12148681 is an equidigital number, since it uses as much as digits as its factorization.

12148681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28490.

The product of its digits is 3072, while the sum is 31.

The square root of 12148681 is about 3485.4958040428. The cubic root of 12148681 is about 229.8845103870.

The spelling of 12148681 in words is "twelve million, one hundred forty-eight thousand, six hundred eighty-one".