21014259 has 8 divisors (see below), whose sum is σ = 32021760. Its totient is φ = 12008136.

The previous prime is 21014243. The next prime is 21014297. The reversal of 21014259 is 95241012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21014259 - 2⁴ = 21014243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21014239) 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, 500319 + ... + 500360.

It is an arithmetic number, because the mean of its divisors is an integer number (4002720).

Almost surely, 2^21014259 is an apocalyptic number.

21014259 is a deficient number, since it is larger than the sum of its proper divisors (11007501).

21014259 is a wasteful number, since it uses less digits than its factorization.

21014259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000689.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 21014259 is about 4584.1312153995. The cubic root of 21014259 is about 275.9548471609.

The spelling of 21014259 in words is "twenty-one million, fourteen thousand, two hundred fifty-nine".