21214759 has 8 divisors (see below), whose sum is σ = 22519728. Its totient is φ = 19916160.

The previous prime is 21214751. The next prime is 21214777. The reversal of 21214759 is 95741212.

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 21214759 - 2³ = 21214751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214751) 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 in 7 ways as a sum of consecutive naturals, for example, 6484 + ... + 9190.

It is an arithmetic number, because the mean of its divisors is an integer number (2814966).

Almost surely, 2^21214759 is an apocalyptic number.

21214759 is a deficient number, since it is larger than the sum of its proper divisors (1304969).

21214759 is a wasteful number, since it uses less digits than its factorization.

21214759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185.

The product of its digits is 5040, while the sum is 31.

The square root of 21214759 is about 4605.9482194224. The cubic root of 21214759 is about 276.8297119628.

The spelling of 21214759 in words is "twenty-one million, two hundred fourteen thousand, seven hundred fifty-nine".