13520057 has 2 divisors, whose sum is σ = 13520058. Its totient is φ = 13520056.

The previous prime is 13520053. The next prime is 13520069. The reversal of 13520057 is 75002531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8271376 + 5248681 = 2876^2 + 2291^2 .

It is an emirp because it is prime and its reverse (75002531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13520057 - 2² = 13520053 is a prime.

It is not a weakly prime, because it can be changed into another prime (13520053) 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, 6760028 + 6760029.

It is an arithmetic number, because the mean of its divisors is an integer number (6760029).

Almost surely, 2^13520057 is an apocalyptic number.

It is an amenable number.

13520057 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520057 is an equidigital number, since it uses as much as digits as its factorization.

13520057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 13520057 is about 3676.9630131401. The cubic root of 13520057 is about 238.2280198262.

Adding to 13520057 its reverse (75002531), we get a palindrome (88522588).

The spelling of 13520057 in words is "thirteen million, five hundred twenty thousand, fifty-seven".