21014285 has 8 divisors (see below), whose sum is σ = 26544480. Its totient is φ = 15926544.

The previous prime is 21014243. The next prime is 21014297. The reversal of 21014285 is 58241012.

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 21014285 - 2¹² = 21010189 is a prime.

It is a super-2 number, since 2×21014285² = 883200348122450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21014285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110507 + ... + 110696.

It is an arithmetic number, because the mean of its divisors is an integer number (3318060).

Almost surely, 2^21014285 is an apocalyptic number.

It is an amenable number.

21014285 is a deficient number, since it is larger than the sum of its proper divisors (5530195).

21014285 is a wasteful number, since it uses less digits than its factorization.

21014285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221227.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 21014285 is about 4584.1340512686. The cubic root of 21014285 is about 275.9549609697.

Adding to 21014285 its reverse (58241012), we get a palindrome (79255297).

The spelling of 21014285 in words is "twenty-one million, fourteen thousand, two hundred eighty-five".