14390521 has 4 divisors (see below), whose sum is σ = 14779492. Its totient is φ = 14001552.

The previous prime is 14390501. The next prime is 14390527. The reversal of 14390521 is 12509341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12509341 = 13 ⋅962257.

It can be written as a sum of positive squares in 2 ways, for example, as 11634921 + 2755600 = 3411^2 + 1660^2 .

It is a cyclic number.

It is not a de Polignac number, because 14390521 - 2⁵ = 14390489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14390527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194430 + ... + 194503.

It is an arithmetic number, because the mean of its divisors is an integer number (3694873).

Almost surely, 2^14390521 is an apocalyptic number.

It is an amenable number.

14390521 is a deficient number, since it is larger than the sum of its proper divisors (388971).

14390521 is an equidigital number, since it uses as much as digits as its factorization.

14390521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388970.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 14390521 is about 3793.4840186826. The cubic root of 14390521 is about 243.2346855195.

Adding to 14390521 its reverse (12509341), we get a palindrome (26899862).

The spelling of 14390521 in words is "fourteen million, three hundred ninety thousand, five hundred twenty-one".