12667481 has 2 divisors, whose sum is σ = 12667482. Its totient is φ = 12667480.

The previous prime is 12667463. The next prime is 12667507. The reversal of 12667481 is 18476621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10465225 + 2202256 = 3235^2 + 1484^2 .

It is a cyclic number.

It is not a de Polignac number, because 12667481 - 2¹⁴ = 12651097 is a prime.

It is a super-2 number, since 2×12667481² = 320930149770722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12667441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6333740 + 6333741.

It is an arithmetic number, because the mean of its divisors is an integer number (6333741).

Almost surely, 2^12667481 is an apocalyptic number.

It is an amenable number.

12667481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12667481 is an equidigital number, since it uses as much as digits as its factorization.

12667481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 12667481 is about 3559.1404861286. The cubic root of 12667481 is about 233.1113505606. Note that the first 3 decimals are identical.

The spelling of 12667481 in words is "twelve million, six hundred sixty-seven thousand, four hundred eighty-one".