12513481 has 2 divisors, whose sum is σ = 12513482. Its totient is φ = 12513480.

The previous prime is 12513469. The next prime is 12513499. The reversal of 12513481 is 18431521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8065600 + 4447881 = 2840^2 + 2109^2 .

It is an emirp because it is prime and its reverse (18431521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12513481 - 2¹⁹ = 11989193 is a prime.

It is a super-2 number, since 2×12513481² = 313174413474722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12513401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256740 + 6256741.

It is an arithmetic number, because the mean of its divisors is an integer number (6256741).

Almost surely, 2^12513481 is an apocalyptic number.

It is an amenable number.

12513481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513481 is an equidigital number, since it uses as much as digits as its factorization.

12513481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 12513481 is about 3537.4398934823. The cubic root of 12513481 is about 232.1628427178.

The spelling of 12513481 in words is "twelve million, five hundred thirteen thousand, four hundred eighty-one".