14978521 has 2 divisors, whose sum is σ = 14978522. Its totient is φ = 14978520.

The previous prime is 14978519. The next prime is 14978533. The reversal of 14978521 is 12587941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11022400 + 3956121 = 3320^2 + 1989^2 .

It is an emirp because it is prime and its reverse (12587941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14978521 - 2¹ = 14978519 is a prime.

Together with 14978519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (14978591) 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, 7489260 + 7489261.

It is an arithmetic number, because the mean of its divisors is an integer number (7489261).

Almost surely, 2^14978521 is an apocalyptic number.

It is an amenable number.

14978521 is a deficient number, since it is larger than the sum of its proper divisors (1).

14978521 is an equidigital number, since it uses as much as digits as its factorization.

14978521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 14978521 is about 3870.2094258580. The cubic root of 14978521 is about 246.5034361591.

The spelling of 14978521 in words is "fourteen million, nine hundred seventy-eight thousand, five hundred twenty-one".