12773521 has 2 divisors, whose sum is σ = 12773522. Its totient is φ = 12773520.

The previous prime is 12773513. The next prime is 12773531. The reversal of 12773521 is 12537721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8042896 + 4730625 = 2836^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 12773521 - 2³ = 12773513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12773521.

It is not a weakly prime, because it can be changed into another prime (12773531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6386760 + 6386761.

It is an arithmetic number, because the mean of its divisors is an integer number (6386761).

Almost surely, 2^12773521 is an apocalyptic number.

It is an amenable number.

12773521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12773521 is an equidigital number, since it uses as much as digits as its factorization.

12773521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 28.

The square root of 12773521 is about 3574.0062954617. The cubic root of 12773521 is about 233.7600054817.

The spelling of 12773521 in words is "twelve million, seven hundred seventy-three thousand, five hundred twenty-one".