12275981 has 4 divisors (see below), whose sum is σ = 12384732. Its totient is φ = 12167232.

The previous prime is 12275959. The next prime is 12276001. The reversal of 12275981 is 18957221.

12275981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18957221 = 23 ⋅824227.

It can be written as a sum of positive squares in 2 ways, for example, as 1713481 + 10562500 = 1309^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 12275981 - 2⁶ = 12275917 is a prime.

It is a super-2 number, since 2×12275981² = 301399419024722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12275911) 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, 54206 + ... + 54431.

It is an arithmetic number, because the mean of its divisors is an integer number (3096183).

Almost surely, 2^12275981 is an apocalyptic number.

It is an amenable number.

12275981 is a deficient number, since it is larger than the sum of its proper divisors (108751).

12275981 is a wasteful number, since it uses less digits than its factorization.

12275981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108750.

The product of its digits is 10080, while the sum is 35.

The square root of 12275981 is about 3503.7096055467. The cubic root of 12275981 is about 230.6846706055.

The spelling of 12275981 in words is "twelve million, two hundred seventy-five thousand, nine hundred eighty-one".