21014245 has 8 divisors (see below), whose sum is σ = 28819584. Its totient is φ = 14409744.

The previous prime is 21014243. The next prime is 21014297. The reversal of 21014245 is 54241012.

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 21014245 - 2¹ = 21014243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300169 + ... + 300238.

It is an arithmetic number, because the mean of its divisors is an integer number (3602448).

Almost surely, 2^21014245 is an apocalyptic number.

It is an amenable number.

21014245 is a deficient number, since it is larger than the sum of its proper divisors (7805339).

21014245 is an equidigital number, since it uses as much as digits as its factorization.

21014245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600419.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21014245 is about 4584.1296883923. The cubic root of 21014245 is about 275.9547858792.

Adding to 21014245 its reverse (54241012), we get a palindrome (75255257).

The spelling of 21014245 in words is "twenty-one million, fourteen thousand, two hundred forty-five".