14021521 has 8 divisors (see below), whose sum is σ = 14523624. Its totient is φ = 13528320.

The previous prime is 14021519. The next prime is 14021531. The reversal of 14021521 is 12512041.

It can be written as a sum of positive squares in 4 ways, for example, as 250000 + 13771521 = 500^2 + 3711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 14021521 - 2¹ = 14021519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 14021495 and 14021504.

It is not an unprimeable number, because it can be changed into a prime (14021531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065 + ... + 5401.

It is an arithmetic number, because the mean of its divisors is an integer number (1815453).

Almost surely, 2^14021521 is an apocalyptic number.

It is an amenable number.

14021521 is a deficient number, since it is larger than the sum of its proper divisors (502103).

14021521 is an equidigital number, since it uses as much as digits as its factorization.

14021521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 14021521 is about 3744.5321470112. The cubic root of 14021521 is about 241.1376600284.

Adding to 14021521 its reverse (12512041), we get a palindrome (26533562).

The spelling of 14021521 in words is "fourteen million, twenty-one thousand, five hundred twenty-one".