13470521 has 2 divisors, whose sum is σ = 13470522. Its totient is φ = 13470520.

The previous prime is 13470497. The next prime is 13470539. The reversal of 13470521 is 12507431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13402921 + 67600 = 3661^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 13470521 - 2¹⁴ = 13454137 is a prime.

It is a super-2 number, since 2×13470521² = 362909872022882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13473521) 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, 6735260 + 6735261.

It is an arithmetic number, because the mean of its divisors is an integer number (6735261).

Almost surely, 2^13470521 is an apocalyptic number.

It is an amenable number.

13470521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13470521 is an equidigital number, since it uses as much as digits as its factorization.

13470521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 13470521 is about 3670.2208380423. The cubic root of 13470521 is about 237.9367166916.

Adding to 13470521 its reverse (12507431), we get a palindrome (25977952).

The spelling of 13470521 in words is "thirteen million, four hundred seventy thousand, five hundred twenty-one".