12670981 has 4 divisors (see below), whose sum is σ = 12878764. Its totient is φ = 12463200.

The previous prime is 12670963. The next prime is 12670997. The reversal of 12670981 is 18907621.

It is a happy number.

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 3724900 + 8946081 = 1930^2 + 2991^2 .

It is a cyclic number.

It is not a de Polignac number, because 12670981 - 2¹¹ = 12668933 is a prime.

It is a super-2 number, since 2×12670981² = 321107519004722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12670901) 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, 103800 + ... + 103921.

It is an arithmetic number, because the mean of its divisors is an integer number (3219691).

Almost surely, 2^12670981 is an apocalyptic number.

It is an amenable number.

12670981 is a deficient number, since it is larger than the sum of its proper divisors (207783).

12670981 is an equidigital number, since it uses as much as digits as its factorization.

12670981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207782.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 12670981 is about 3559.6321439160. The cubic root of 12670981 is about 233.1328179856.

The spelling of 12670981 in words is "twelve million, six hundred seventy thousand, nine hundred eighty-one".