21714249 has 8 divisors (see below), whose sum is σ = 28978272. Its totient is φ = 14463200.

The previous prime is 21714247. The next prime is 21714263. The reversal of 21714249 is 94241712.

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 21714249 - 2¹ = 21714247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21714247) 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, 1774 + ... + 6824.

It is an arithmetic number, because the mean of its divisors is an integer number (3622284).

Almost surely, 2^21714249 is an apocalyptic number.

It is an amenable number.

21714249 is a deficient number, since it is larger than the sum of its proper divisors (7264023).

21714249 is a wasteful number, since it uses less digits than its factorization.

21714249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6487.

The product of its digits is 4032, while the sum is 30.

The square root of 21714249 is about 4659.8550406638. The cubic root of 21714249 is about 278.9854824732.

The spelling of 21714249 in words is "twenty-one million, seven hundred fourteen thousand, two hundred forty-nine".