12957481 has 2 divisors, whose sum is σ = 12957482. Its totient is φ = 12957480.

The previous prime is 12957467. The next prime is 12957509. The reversal of 12957481 is 18475921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9096256 + 3861225 = 3016^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 12957481 - 2¹⁵ = 12924713 is a prime.

It is a super-2 number, since 2×12957481² = 335792627730722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12957481.

It is not a weakly prime, because it can be changed into another prime (12957401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478740 + 6478741.

It is an arithmetic number, because the mean of its divisors is an integer number (6478741).

Almost surely, 2^12957481 is an apocalyptic number.

It is an amenable number.

12957481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12957481 is an equidigital number, since it uses as much as digits as its factorization.

12957481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 12957481 is about 3599.6501218868. The cubic root of 12957481 is about 234.8768390402.

The spelling of 12957481 in words is "twelve million, nine hundred fifty-seven thousand, four hundred eighty-one".