13610521 has 2 divisors, whose sum is σ = 13610522. Its totient is φ = 13610520.

The previous prime is 13610501. The next prime is 13610563. The reversal of 13610521 is 12501631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13542400 + 68121 = 3680^2 + 261^2 .

It is an emirp because it is prime and its reverse (12501631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13610521 - 2⁷ = 13610393 is a prime.

It is not a weakly prime, because it can be changed into another prime (13610501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6805260 + 6805261.

It is an arithmetic number, because the mean of its divisors is an integer number (6805261).

Almost surely, 2^13610521 is an apocalyptic number.

It is an amenable number.

13610521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13610521 is an equidigital number, since it uses as much as digits as its factorization.

13610521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 13610521 is about 3689.2439604884. The cubic root of 13610521 is about 238.7581746605.

The spelling of 13610521 in words is "thirteen million, six hundred ten thousand, five hundred twenty-one".