21714265 has 8 divisors (see below), whose sum is σ = 26094600. Its totient is φ = 17346432.

The previous prime is 21714263. The next prime is 21714271. The reversal of 21714265 is 56241712.

It can be written as a sum of positive squares in 4 ways, for example, as 156816 + 21557449 = 396^2 + 4643^2 .

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 21714265 - 2¹ = 21714263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21714263) 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, 1261 + ... + 6709.

It is an arithmetic number, because the mean of its divisors is an integer number (3261825).

Almost surely, 2^21714265 is an apocalyptic number.

It is an amenable number.

21714265 is a deficient number, since it is larger than the sum of its proper divisors (4380335).

21714265 is an equidigital number, since it uses as much as digits as its factorization.

21714265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251.

The product of its digits is 3360, while the sum is 28.

The square root of 21714265 is about 4659.8567574551. The cubic root of 21714265 is about 278.9855509961.

Adding to 21714265 its reverse (56241712), we get a palindrome (77955977).

The spelling of 21714265 in words is "twenty-one million, seven hundred fourteen thousand, two hundred sixty-five".